Make or Buy Terry Incorporated manufactures machine parts for aircraft engines. CEO Bucky Waiters is considering an offer from a subcontractor to provide 2,300 units of product OP89 for $179,400. If Terry does not purchase these parts from the subcontractor, it must continue to produce them in-house with these costs: Required: 1. What is the relevant cost per unit to make the product internally? 2. What is the estimated increase or decrease in short-term operating profit of producing the product internally versus purchasing the product from a supplier