Khybar inc. manufactures dental x-ray machines. the company can sell an x-ray machine which cost $508.17 to produce for $1,295.75. each of the company’s two salespeople earns a different commission per sale, as shown in the table below. salesperson commission/sale greg $243.15 colleen $288.75 last year, greg sold 11 fewer x-ray machines than colleen did. khybar inc.’s total expenses last year, not counting production costs or commissions, came to $79,558.59. if khybar inc. broke even, how many x-ray machines were sold last year in total? a. 149 b. 153 c. 157 d. 160