Which machine should be chosen

ABC is trying to decide between two machines which are necessary in their manufacturing facility. Data concerning the two machines are presented below. If ABC has an interest rate of 10%, which machine should be chosen? Machine A Machine B First Cost $42.000 $80.000 Annual Operating costs $6,000 $7,000 year 1. increasing by S1000 per year Salvage Value Useful Life 0 2 years $4.000 4 years