Products, their variations (all attributes except length), vendor mapping, and pricing for each length. Every edit is written to the sheet and logged in its Change Log column.
Base price = buying price + 10%, in the unit it was bought in.Price diff = selling price − base price per piece. Profit % = price diff ÷ base price per piece.For kg-bought items the per-piece base uses Price per piece (or Price per kg × weight per piece).