Cost the selected materials
Enter the usable quantity and unit purchase cost for each material. Apply a user-chosen wastage fraction only to the rows where that planning allowance makes sense.
Add the work around the stems
Include packaging, paid preparation labour, other allocated costs and delivery allocation. Do not hide them inside a guessed industry-standard markup.
Keep the boundary clear
A recipe-cost plan is not stock control, spoilage accounting, delivery routing or a promise that a chosen margin will work in the market.