Westport Inspection Service specializes in inspecting cars that have been returned to automobile leasing companies at the end of their leases. Westport’s charge for each inspection is $60; its average cost per inspection is $15. The owner wants to expand his business by hiring another employee and purchasing an automobile. The fixed costs of the new employee and automobile would be $3,000 per month. How many inspections per month would the new employee have to perform to earn a profit of $1,500?