What is the best practice for capitalizing other non-direct material costs as part of the assembly value? When using service items for labor costs and non-inventory items for production supplies, we can't change their amount/cost on the Assembly Build and Work Order (no WIP). Sometimes, the labor cost isn't the same for all WOs/Assembly Builds. P.S. The cost used on Assembly Builds/WOs for Service Items/Non-inventory Items comes from the Purchase Price field on those item records.