25. The Super-Star Company produces three models of microcomputers-SS 100, SS 150 and SS250. Most of the components are imported from the Far East, and the company only assembles the microcomputers. The operation hours required to produce one unit of the microcomputers are 2 hours for SSlO0, 3 hours for SS150 and 4 hours for SS250. The normal capacity of the assembly line is 400 hours per month. The profits per unit are Rs 10,000 for SSlO0, Rs 15,000 for SS150 and Rs 25,000 for SS250. The president of the company has set the following goals, according to their order of importance:

(i) Avoid the underutilisation of production capacity.

(ii) Meet the outstanding orders-30 units for SSlO0, 20 units for SS150 and 50 units for SS250.

(iii) Avoid the overutilisation of the production capacity.

(iv) Maximise total profit as much as possible.

Formulate a goal programming model for the problem and solve it (up to three iterations only).