An automobile leasing company has a contract with a new car dealer to do major repairs for $720 per car. the leasing company estimates that for $400,000, it could buy equipment to service their own cars at a cost of $300 per car. if the equipment will have a salvage value of 10% of its first cost after 15 years, the minimum number of cars that must require major servicing each year to justify the equipment at a marr of 10% per year is closest

a. 88
b. 122
c. 128
d. 143