hello doing this on excel and im having difficulties coudl you help?

EX 6-6 EXCEL: Three alternatives are being considered to improve an assembly line along with the "do-nothing" alternative. Each of Plans A, B, and C has a 10-year life and a salvage value equal to 10% of its original cost. If interest is 8%, which plan, if any, should be adopted? Consider the salvage value as a benefit, because it is a cash inflow