Union Kitchen replaced the coovection oven two years ago. Today, the company found that a new coovection oven that cooks more quickly with lower operating expenses was available. The company is considering the purchase of this faster, lower-operating cost coevection oven to replace the existing one they recently purchased. Selocted information about the two ovens is given below: Required: a. What costs are sunk? List. b. What costs are relevant? List. c. What ase the net cash fows over the next 4 yean assuming the company purchases the new convection ovea? d. What other isems sbould the company consider when making this decision