Item;Machine A;Machine B
First cost;$6,500;$8,500
Service life;4 years;6 years
Estimated salvage value;$600;$1,000
Annual O&M costs;$800;$520
Change oil filter every other year;$100;None Engine ov,

Which machine has the higher estimated salvage value?
a. Machine A
b. Machine B
c. Both have the same estimated salvage value
d. Not enough information to determine