Practical guides

Practical guides for running a shop

Counting a drawer, getting out an invoice the purchasing department will not send back, following an opened can, taking a mobile payment without getting caught. Six methods you can apply tonight, with a notebook if that is all you have to hand. At the end of each guide, what COMZA does in your place.

Guide 1 · Register

Minding a register without slipping up: the five-step method

At 7 pm, every dollar in the drawer must be explainable. Most of the time, the gap comes from money paid out that nobody wrote down. Count three minutes before the first customer, three minutes before pulling the shutter down.

The open drawer, notes counted by value, and the evening sheet where the $2.00 gap is written and signed 502010pcs Evening cash-up expectedcountedgap 902,60 $900,60 $ −2,00 $

Worth keeping

The drawer is not your wallet, and nobody has a good memory at the end of the day. What comes in and what goes out gets written at the moment it moves.

✓The same float every morning
✓The means of payment noted on every sale
✓A word on every payout
✓A name at the bottom of the evening cash-up
1

Count the float before the first customer

Always the same starting amount: 120,00 $ in small notes and coins. Count, write, compare with last night. At 7:40 am, a gap can still be explained; at closing, nobody remembers anything.

2

Cash in and note the means of payment

Cash, card, transfer, mobile payment. Without that line, you have no idea what the drawer should hold. A customer who pays 30,00 $ in cash and 40,00 $ by phone: note both amounts, not the 70.

3

Write every payout at the moment it leaves

A can of cleaner bought from the neighbour, an advance of 20,00 $ to an employee, the taxi to go and fetch a part. Three words and an amount, straight away: −12,00 $ plastic bags. The payout nobody writes down looks, in the evening, like money gone missing.

4

Count at night, notes and coins, by value

By denomination, in piles of ten: you make fewer mistakes than in a heap. Write your total before looking at the expected figure. Otherwise the count adjusts itself to the hoped-for number, and you are no longer checking anything.

5

Explain the gap that same evening, however small

Expected 902,60 $, counted 900,60 $, gap −2,00 $. Write the reason, or "I do not know", and sign. Two dollars a night make 60,00 $ by the end of the month.

In COMZA, steps 1, 2 and 4 take one move on screen, and the evening gap is already worked out. You are left with the reason to type.

See COMZA's register
Guide 2 · Invoice

Making an invoice you can show a bank

Seven details. One is missing, the customer's purchasing department sends the document back, and you are paid the month after. One forgotten registration number costs you thirty days of cash.

An invoice filled in line by line: the two identities, number 28, the due date, the descriptions, the discount as an amount and the total to pay INVOICE 28 due 30/10 72,00 $ 68,00 $ 34,00 $ discount −5,00 $ to pay 169,00 $

The ten-second test

Hand the sheet to someone who knows neither you nor the customer. If he cannot find who sold, to whom, what, when, how much and how to pay, the document will come back to you.

✕"Invoice no. 3" after a no. 27
✕"Sundry goods" as a description
✕A discount as a percentage, with no amount
✕No due date
1

Your full identity, at the top

The exact name you are registered under, the address, the phone, the email, your registration numbers. The legal name, not the sign painted on the window: that is the one the customer's accountant looks for.

2

The customer's identity, as precise as yours

Exact name, address, registration number if it is a company. An invoice addressed to "Mr Ibrahim" cannot be booked as an expense, and you will learn that three weeks later. Ask before you deliver.

3

An unbroken number, no gap and no duplicate

Number in order, without skipping. A gap in the run suggests an invoice was pulled, and that is the first thing an inspector looks at. To cancel, do not rub out the number: issue a credit note.

4

Two dates: issue and due

The day you issue it, and the day you expect the money. Write the due date in full, 30/10/2026, rather than "30 days" that everyone counts their own way. With no due date, no invoice is late and you have nothing to chase.

5

A clear description, the quantities and the unit prices

One line per item or service, with the name the customer recognizes, the quantity and the unit price. " 4 h of fitting at 18,00 $ " goes down better than "labour: 72,00 $ ". For a practice, " 2 sessions at 34,00 $ ". The customer who redoes the sum in his head does not pick up the phone.

6

The discount as an amount, then the total

The discount in money, −5,00 $, never as a percentage: a calculation the customer redoes, he will end up disputing. Subtotal, discount, total to pay, on three separate lines.

7

Your country's legal details and the means of settlement

Ask your tax administration once for the list of required details, taxes and late penalty included, and put them in your template. Finish with the means of settlement: transfer, mobile payment, or cash against a signed receipt.

In COMZA, those details are set once and for all: every invoice comes out complete, numbered in order, in the customer's language.

See COMZA's invoices
Guide 3 · Stock

Keeping stock when you sell by the bag and by the unit

A drum of engine oil of 200 L sold by the litre, a carton of 24 bottles sold by the bottle: that is the most common case at the counter, and the one software handles worst. Five settings, once and for all.

A 200-litre drum of engine oil breaking down into litres sold, the opened one followed apart 1 drum · 200 L bought $28.00 1 L 1,70 $ the open drum, followed apart 11 drums + 8 L

The trap to avoid

The classic mistake: creating two separate products, "oil by the drum" and "oil by the litre". The two stocks each go their own way, and a month later neither is right.

✓One product, two ways of selling it
✓What the container holds, written once
✓The opened container followed apart
1

Describe the container, once only

Write what is inside: 200 litres in a drum, 24 bottles in a carton, 40 bags on a pallet. If it is not written, everyone does the conversion in their head, and two employees do not do it the same way.

2

Let the unit price be worked out, do not set it in your head

Purchase price of the container, your margin, then the division. A paint can of 20 L bought at 28,00 $ and sold at 34,00 $ gives 1,70 $ per litre. Round off afterwards: you will see what the rounding takes from you or brings you.

3

Count your stock in number of containers

That is the unit you buy in and the one you store in. "There are 12 cans left" can be checked by looking up. "There are 240 litres left", no.

4

Follow the opened container apart

There is always an open can at the counter, and that is the one people forget. Note what is left: 12 closed cans, plus 8 litres in the open one. That single line explains most stocktake gaps.

5

Set the alert threshold on your restocking time

The threshold is not a round figure: it is what you sell while the order is on its way. 3 cans a day, 4 days on the road, so an alert at 12. Add enough to cover a late delivery, because there will be one.

In COMZA, the container is described once; the register converts at every sale, open one included.

See stock in COMZA
Guide 4 · Payments

Recording and proving a mobile payment

The money arrives on a phone, not in the drawer. In the evening, you no longer know whether the repair at 28,40 $ was paid or only promised. Five moves make that payment as solid as a note.

The amount received on the phone, reference 7K4-2290, and the confirmation screenshot filed with the sale 28,40 $ received on the phone ref. 7K4-2290 14:36 the proof, attached to the sale

The golden rule

No transaction reference and no proof attached: the payment does not exist. A customer in good faith gives you his code without arguing.

✓The reference, even a short one
✓The time of the transfer
✓The sender's name
1

Record the means of payment apart from cash

Never in the same column as cash: the money is not in the same place and is not checked the same way. In the evening, you announce 842,60 $ in the drawer and 316,00 $ on the phone.

2

Enter the transaction reference at payment

The customer gets a confirmation code. Ask for it, note it on the sale with the time. That is what saves you when the transfer is disputed two weeks later.

3

Attach the proof to the sale, not to a separate folder

Photograph the confirmation screen and file the image on the sale, not in the phone gallery between two family photos. A proof you cannot find is worth nothing. On paper: the reference on the back of the copy, filed by date.

4

Reconcile in the evening, line by line

The mobile account statement against the list of sales paid that way. Both totals come out right, or else there is a sale taken with no reference, or a transfer that never left. Ten minutes.

5

When the payment arrives late, mark it pending

A transfer started in front of you may only arrive the next morning. Neither paid nor cancelled: mark "payment pending" with the reference announced, then settle it the next day, confirmation or reminder.

In COMZA, the reference and the attachment are on the payment screen, and the "pending" state already exists.

See payments in COMZA
Guide 5 · Team

Organizing your team around the register

Most register problems are organization problems. When three people touch the same drawer, the evening gap belongs to nobody. Four decisions to take once, then a quarter of an hour of review a week.

Three people around a counter, each with his role, and the discount above the cap going off for approval discount −$20.00 to approve cashier seller manager

What you are after

Everyone must know what he can decide alone and what he must get approved. An employee who has been given the rules in writing is also an employee nobody suspects when 40,00 $.

✓A name on every sale
✓A written discount cap
✓A short weekly review
1

Decide who cashes in, and do not share it

One person per drawer per day. Two in the same drawer, and the evening gap has no owner. To hand over at midday: close, count, reopen in the next one's name. Two minutes, and you know which half of the day the problem comes from.

2

Set the discount caps by role, as amounts

Write them and post them near the register: a seller gives up to 5,00 $ alone, a floor supervisor up to 20,00 $, above that it is you. As an amount, never as a percentage. With no written cap, every discount becomes a negotiation with the customer, then with you.

3

Have four things approved, not forty

A discount above the cap, a cancellation, a return or credit note, a cash payout. The rest slows the counter down without protecting anything. An approval that takes more than ten seconds will be worked around on the first busy Saturday.

4

Keep the name of who did what

Every sale, every discount, every cancellation, every cash-up carries a name and a time. Not to accuse anyone: so you can ask three days later what happened, and get a precise answer.

5

Review sales by seller once a week

A quarter of an hour, the same day every week. Three figures per person: total taken, total of discounts, number of cancellations. Say what is going well too, otherwise the review turns into a tribunal and the figures start getting dressed up.

In COMZA, discount caps are attached to roles, the approval request reaches the manager's phone, and the report by seller is already ready on Monday.

See the roles in COMZA
Guide 6 · Stocktake

Doing a stocktake without closing the shop

One stocktake a year, eight hours on a Sunday, throws up gaps ten months old that nobody can explain any more. Count one aisle at a time, while the shop works.

The stocktake aisle by aisle: a single shelf counted today, the count sheet beside it aisle 2 of 7 breakage · 2

Changing method

One aisle a week instead of everything in one day. You count as many products over the year, but each gap is three days old and someone still remembers it.

✓Count before opening or at quiet hours
✓A reason for every gap
✓Expensive products counted more often
1

Prepare the list for the aisle to count

Pull that aisle only, in shelf order, with an empty column for the count. Shelf order and not alphabetical: you count twice as fast. Hide the expected quantity, or it gets copied out without anyone looking at the shelf.

2

Count by aisle, at a quiet moment

Before opening, or in the lull of the afternoon. Treat the stockroom and the sales floor as two different places, or the same cartons get counted twice. For open containers, note what is left inside.

3

Enter the gaps with their reason

A gap with no reason corrects a figure and teaches you nothing. Always the same words: breakage, expiry, theft, receiving error, register error. Five is enough; with fifteen reasons, nobody picks the right one.

4

Look for where the difference comes from before correcting

Three causes cover nearly everything: a delivery received but never recorded, a retail sale badly converted from the container, goods thrown out without being noted. Look at those three before adjusting stock. Correcting straight away wipes out the trace of the problem, which will be back next month.

5

Start again more often, on fewer products

The 20 most expensive or most stolen items, every week. The bulk of the catalog once a month. The rest twice a year. A quarter of an hour a day covers most of the money you have in stock.

6

Put a figure on what the gaps cost you

At the end of the month, add the gaps up in money, reason by reason. If expiry weighs 180,00 $ and all the rest 40,00 $, your problem is not theft: you are ordering too much, or taking batches out in the wrong order. Next month, order accordingly.

In COMZA, the list comes out in aisle order, the gap reasons are already in place and the cost of the month's losses is added up for you.

See losses in COMZA

These six methods, but done in your place

These six guides fit in a school notebook — plenty of shopkeepers manage just fine that way. COMZA keeps them for you from the free plan on, which is never charged and ties you to nothing.

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