Chapter 6
I already have stock. How do I tell it?
You state what you already have, once, and the system takes it from there — every sale afterwards reduces exactly this starting figure.
For each item, say how much you have and what it cost you — one figure is enough even if you bought the same item at different prices over time; a shop just starting out is not expected to reconstruct every past purchase. Enter it warehouse by warehouse if you use more than one; the system checks everything you type before anything is saved, and tells you about every problem at once rather than stopping at the first one.
It is safe to try, and safe to fix
Restating the same item a second time is recognised as the same line, not added on top of it — so re-checking your own work never doubles a number by accident.
What can wait: an exact cost for goods bought long ago, in many small batches, is not needed on day one. One honest figure per item is enough to start; the detail a shop actually tracks purchase by purchase builds up naturally from here.