Read the finisher’s billing rule before dividing by quantity

Separate the coating scope from the price model

The Type II, Type III and chem-film buttons are illustrative invoice scenarios for different requested treatments. They are not interchangeable process specifications or supplier quotations. Confirm the drawing’s exact specification, revision, class, color, thickness and masking requirements before requesting a finisher’s price. An attractive piece price for the wrong scope is not a useful estimate. The model handles invoice arithmetic only and cannot predict coating performance, dimensional growth or whether a part can be racked as assumed.

Ask whether the lot figure is additive

Some offers state a lot charge plus piece cost; others invoice the greater of a minimum and the calculated piece total. Those are different rules, especially on small batches. The selector makes that choice explicit. Additional rack charges are added after the base, and the entered fee applies to both base and racks. If the vendor applies its fee to a different amount or imposes a separate invoice minimum, reproduce that policy in the supplier quote or adjust the inputs deliberately. Do not treat a percentage called environmental fee as universal across finishers.

Allocate the actual release and the extra work

Racks round up to complete loads using the entered parts-per-rack capacity. A large or delicate part may need more spacing, special contacts or multiple handling steps, so confirm the count with the processor. The displayed amount is outside invoice cost before the shop’s own handling markup, freight and tax. Add inspection, cert review, protected packaging and any required rework allowance separately when they are not included in the routing. Recalculate each released batch rather than spreading a lot minimum across an annual forecast that may never be ordered.

• Apply the shop’s approved outside-processing markup