Comparing Mutually Exclusive Projects Pugs Indus PISC) is trying to decide between two different conveyor belt systems. System A Costs $405 0Ik has a three-year life, and requires $105,000 in pretax annual op- craling costs. System B costs $450,000. has a five-year life, and requires $60.0 00 in pretax annual operating costs. Both systems are to be depreciated straight-line lo zero over their lives and will have zero salvage value. Whichever project is chosen, it will mew be replaced when it wears QuL. the Lix rate is 34 percent und