Lang Industrial Systems Company $($LISC$)$ is trying to decide between two different conveyer belt systems. System A costs $$290,000,$ has a four$-$year life, and requires $$80,000$ in pretax annual operating costs. System B costs $$375,000,$ has a six$-$year life, and requires $$74,000$ in pretax annual operating costs. Both systems are to be depreciated straight$-$line to zero over their lives and will have zero salvage value. Whichever project is chosen, it will not be replaced when it wears out. The applicable tax rate is $34$ percent and the discount rate is $8$ percent.

a$)$ Calculate the OCF and NPV for each project. b$)$ Which project should the firm choose?