A merchant plans to sell two models of home computers atcosts of $250 and $400, respectively. The $250 model yields aprofit of $45 and the $400 model yields a profit of $50. Themerchant estimates that the total monthly demand will notexceed 250 units. Find the number of units of each model thatshould be stocked in order to maximize profit. Assume thatthe merchant does not want to invest more than $70,000 incomputer inventory. (See Exercise 21 in Section 9.2.)