a granary has two options for a conveyor used in the manufacture of grain for transporting, filling, or emptying. one conveyor can be purchased and installed for $95,000 with $4,500 salvage value after 16 years. the other can be purchased and installed for $95,000 with $5,500 salvage value after 16 years. operation and maintenance for each is expected to be $21,000 and $16,500 per year, respectively. the granary uses macrs-gds depreciation, has a marginal tax rate of 25%, and has a marr of 9% after taxes.