The number to watch
Sheet count against square feet sold. Ply is bought by the sheet and often sold by area, and the difference between the two — offcuts, cutting waste, sheets damaged in handling — is where the margin goes. Recording both keeps the number visible. Where cutting is charged as a service on its own line, you can also see whether that work is paying for itself or being given away.
Grade, thickness and size are separate items
Ply comes in grades, thicknesses and sheet sizes, and the price difference between them is substantial. A shop that enters them as one item cannot trust its stock and will bill the wrong rate regularly. Each combination as its own item — MR or BWP, 6mm to 19mm, standard sizes — is what makes both the invoice and the closing stock mean something, and it makes the reorder list readable.
Sheets and square feet
Ply is bought by the sheet and often quoted by the square foot, and a carpenter buying a mixed order wants both to be right. Holding the conversion on the item lets you sell either way from the same stock. Cutting to size is a service with its own charge and should sit on its own line rather than being folded into the rate, which keeps your material price comparable to the shop down the road.
Carpenter and contractor accounts
Your buyer is usually a carpenter working an interior job that will be paid in stages. Material goes out over weeks against a job with no fixed end date, which is exactly the pattern where credit quietly grows. A limit set at the start, ageing so you can see which jobs have stalled, and deliveries recorded against the site are what keep a large account from becoming a problem account.