=7.16. The school board for the Bellevue School District has made the decision to purchase 1,350 additional Macintosh computers for computer laboratories in all its schools. Based on past experience, the school board also has directed that these computers should be purchased from some combination of three companies—Educomp, Macwin, and McElectronics. In all three cases, the companies charge a discounted variable cost per The school board wants to determine the minimum-cost plan for meeting its computer needs.