Epsilon Co. can produce a unit of product for the following costs: Direct material $ 7.80 Direct labor 23.80 Overhead 39.00 Total product costs per unit $ 70.60 An outside supplier offers to provide Epsilon with all the units it needs at $59.00 per unit. If Epsilon buys from the supplier, the company will still incur 40% of its overhead. Epsilon should choose to: