Know what everything costs
- Bills of materials for each variant. Maple and walnut versions use different wood, so each gets its own BOM.
- Every build records its material cost when it starts. Later price changes don't rewrite history.
- Contribution margin report: each product's price, cost and margin, plus how many you need to sell to cover a month's operating expenses.
- Inventory report: raw materials, work in progress and finished goods, each valued, with a CSV for your accountant.