Cullumber Manufacturing is considering the purchase of new computerized equipment. The machine costs $63000 and would generate $18480 in annual cost savings over its 5-year life. At the end of 5 years, the equipment would have a $4200 salvage value. Cullumber's required rate of return is 16%. Using the present value tables, the machine's net present value is (round to the nearest dollar)

a. $-2491.

b. $445.

c. $60509.

d. $-491.