Modify System Option #21, which converts "pieces" to "cases" in Invoicing, so it does not recalculate the CASE item's unit price.

1. If both the CASE and PC item are "Priced by Weight," the CASE item will use the PC item's unit price.

2. If both the CASE and PC item are "Priced by Unit," the CASE item will use the PC item's unit price multiplied by the “Pieces”.

3. Otherwise, the CASE item's unit price will be recalculated.