A company is comparing between two different models for a mixer to purchase one of them. However, they have different characteristics as defined below. The company's MARR is X%. 12% Model First Cost ($) Service Life (Years) 6 Yearly Net Savings (S) 70,000 60,000 Salvage Value ($) $20,000 $10,000 A B 200,000 100,000 8 A. What is the discounted PB period of both models? Which model do you recommend based on the results? B. Using net present worth (NPW) method, which one should the company select