Solve by hand not with excel sheet

A solid-waste recycling plant is considering two types of storage bins using an MARR of 10% per year. (a) Use ROR evaluation to determine which should be selected. (b) Confirm the selection using the regular AW method at MARR 10% per year. Storage Bin First cost, $ AOC, $ per year Salvage value, $ Life, years -18,000 4000 1000 -35,000 3600 2700