Which machine should be chosen on the basis of present worth analysis? Do not treat uniform or gradient payments as a single payment.

Comare Machines A and B on the basis of present worth analysis by using the MARR = 10% Machine A Machine B First Cost $20,000 $10,000 Annual Operating Cost $2,000 $3,000 Salvage Value $4,000 $2,000 Life 6 years 3 years