Difference between the minimum selling price and the actual selling price
Sale price minus cost is profit per unit or marginal producer surplus. It's not quite clear what this "planned profit" means. If you're including opportunity costs in this amount (I could spend my time working another job making X, so if I instead spend my time making Product A, I want to make at least X doing so), those are part of the costs. If you literally mean "How much I think I'll profit from this", that has no economic meaning.