Most stock books fail for the same reason. Everything goes on one page, in the order it happened, and by the second week nobody can tell how many tins of milk are meant to be on the shelf without reading forty lines.
The fix is one page per item. Each product gets its own page, and that page only ever answers one question: how many of this should we have right now?
The format
Rule a hardback notebook like this. At the top of the page, write the item, the unit you count it in, what it costs you, what you sell it for, and the level at which you reorder.
| Date | Details | In | Out | Balance | Sign |
|---|
Date is the day it happened, not the day you remembered to write it. Details says what happened: sold, received, damaged, returned, taken for the house. In is what came into the shop. Out is what left, for any reason. Balance is what should now be on the shelf. Sign is the initials of whoever wrote the line.
That is the whole format. Six columns.
A page filled in
Here is one page for one product over a week. The figures are made up, but the entries are the kind a provision store sees.
Item: Milo 500g tin. Unit: tin. Cost: ₦3,900. Selling price: ₦4,500. Reorder at: 24.
| Date | Details | In | Out | Balance | Sign |
|---|---|---|---|---|---|
| 1 Oct | Opening balance | 36 | AO | ||
| 1 Oct | Sold | 5 | 31 | CN | |
| 2 Oct | Sold | 7 | 24 | CN | |
| 3 Oct | Received, invoice 0412 | 24 | 48 | AO | |
| 3 Oct | Sold | 6 | 42 | CN | |
| 4 Oct | Damaged, dented tin | 1 | 41 | AO | |
| 5 Oct | Sold | 8 | 33 | CN | |
| 6 Oct | Counted on shelf: 32 | 1 | 32 | AO |
A few things to notice. Sales are one line per day, not one line per customer. The daily figure comes from your sales book, so this book stays short. The balance on 2 October hit the reorder level of 24, and the delivery arrived the next day. The dented tin has its own line, so it doesn't turn into an unexplained shortage later.
The last line is the one most books leave out. On 6 October someone counted the shelf and found 32, not 33. The book is corrected to match the shelf, and the missing tin is written down as a fact with a date. One tin is ₦3,900. Now you know.
If you sell hundreds of items
A page per item is right for the goods that matter: anything expensive, fast or easy to carry away. For a shop with 400 lines, nobody is going to keep 400 pages moving every day.
So split it. Keep full pages for your top 30 to 50 items. For the rest, use a weekly sheet with one line per item:
| Item | Opening | Received | Sold | Damaged | Should be | Counted | Difference |
|---|---|---|---|---|---|---|---|
| Sardine 125g | 60 | 48 | 52 | 0 | 56 | 55 | 1 short |
| Bath soap 150g | 40 | 0 | 17 | 0 | 23 | 23 | 0 |
| Tomato paste sachet | 200 | 100 | 164 | 3 | 133 | 133 | 0 |
"Should be" is opening plus received, minus sold and damaged. Then you count, and write what you find.
What makes a stock book useless
Writing it from memory. A book filled in on Saturday for the whole week is a story, not a record. The line goes in on the day.
No line for anything except sales. Goods leave a shop in other ways: breakage, expiry, returns to the supplier, items taken home, samples given out. If the book has no place for them, they all show up as "missing".
Never writing down a count. A book that is never checked against the shelf drifts further from the truth every week. The count line is what keeps it honest. If you haven't done one before, here is how to take stock without closing the shop.
No cost price on the page. Without it you know you are three tins short. With it you know you are ₦11,700 short, which is the number that gets attention.
Pencil, and torn pages. Write in pen. When you make a mistake, rule one line through it and write the correct figure beside it. A book that can be quietly changed proves nothing when you need it to.
One person writes everything. Whoever receives a delivery signs for it. Whoever sold signs the day's line. Initials cost nothing and they are what you will want when a shortage needs explaining.
The stock book also needs a partner. It tells you what should be on the shelf, and the daily sales record book tells you what money should be in the drawer. Each one checks the other.