TradeUse labeled finished blanks and the stock you can buy. The planner keeps material/profile groups separate and shows a board layout, unplaced pieces and a supplier shopping list.
The stock model
For a used board: required length = sum of finished blanks + piece count × kerf + 2 × end allowance. The end allowance already includes preparation loss. An unused board consumes nothing.
Two 1,220 mm pieces total 2,440 mm, but with 3 mm kerf and no end allowance they require 2,446 mm. They cannot share a 2,440 mm board under this model. A piece is never silently shortened or split.
Read cost and loss separately
Purchase cost uses the boards selected in the plan. Finished material, kerf/end loss and remaining offcuts account for the purchased length. An offcut may be too short or unsuitable for another job; the tool does not assign it a resale value.
Plans use a bounded heuristic. Lower purchase cost and lower unused length can favor different stock choices. Inspect the result and supplier availability before ordering; the planner does not guarantee the global optimum or detect stock defects.
Save a local cutting and costing job. Next, build the full job cost.