also find the NPW of alt B. and the NPW of alt C.

A B Initial cost $ 1500 $900 $1200 Annual benefit $800 $200 $180 Salvage value $500 $900 0 Life in years 2 years 3 years Infinity MARR 10% The following four questions are based on the table above. a. The NPW of alt A. is ? Answer format: $ xxxx