RE: What´s the purpose of the new field Base price - Purchase in the item master?
Hello Emma,
I did check the code and here are my findings.
This is part of a new Feature called GUPGlobal which my understanding is for Global Unified Pricing

By ticking this flag you are NOT going to use the base price against the product but you are going to use a new table called GUP ITEM BASE PRICE
according to the code so it seems you can have now date intervals and define different purchase prices for the same product

Now as functional, I cannot tell:
- how this feature is called in the workspace Feature Management
- cannot find any D365 documentation.