Q: How to put a different price for each variation manually in Sku Fetch?
A: When listing a multi variation item, you can create 1 override formula and it applies to all variations on the multi-variation listing. If variation "A" has a different supplier price than variation "B" and "C", then they will all be listed technically with different selling prices, but will be listed with the same formula/margins.
From there, after the item has listed, if you wish to define different override formulas for each variation individually, you would edit the entry for each variation in sku grid and then force reprice the item.