The Item record is the same for all varieties of an Item, and the cost price is a part of the item record.
Regarding the sales price, it is not possible to set different prices per variety. I suggest you to report a development wish
8.5 2023-04-19 (build 85550290)
In the server on the first run:
2025-10-29 09:07:29 Requesting Lookup address
2025-10-29 09:07:29 Failed to create e-mail back, unknown source register
What th...