Question 1 (25 marks) Namibia Enterprises produces a single product called product N. The company requires 30 units in October, 30 units in November and 20 units in December. The demand is supposed to be met every month. However, should there be a demand backlog, the cost of such a backlog per unit is N$5 per each month. This means that if 1 unit demanded in October is only satisfied in December, the backlog cost will be N$5 x 2 months = N$10. All the demand should be met by Page 13 of 15 the end of December. The following table contains the monthly production capacity and production cost per unit: Month Production capacity Production cost per unit N$400 35 units October November 30 units N$420 December 35 units N$410 Each unit in inventory incurs a holding cost of N$20 at the end of each month. Requirement 1.1 Namibia Enterprises aims to reduce the cost of production, cost of backlog and inventory holding costs. Construct a balanced transportation problem that can be used to solve this problem. 1.2 Using the Vogel's approximation method (VAM), find the basic feasible solution of the problem formulated in (1.1) above. 1.3 Using the Modified Distribution Method (MODI), find the optimum solution to the problem in (1.2) above Total Marks 5 10 10 25