Is there a way to fulfill my need below.
Let’s say, for Item A, we left 200 cases in stock, so We’d like to go on promotion for the 200 cases only, because during the selling time, we might do purchase and receipt. So I’d like the promotion price only apply to the 200 cases.
So the ideal scenario shall be $10 promotional prices would fill in orders allocating the 200 cases, after the 200 cases be sold out, $15 （which is the normal price） would be filled in.
Note: For business requirement, we must use the same Inventory ID.