Question

10. A concrete company transports concrete from three plants 1, 2 and 3, to three construction sites A, B and C. Plant 1, 2 and 3 can supply 300, 300 and 100 tons per week respectively. While the requirements for site A, B and C are 200, 200 and 300 tons respectively. The cost of transporting one ton from plant 1 to site A, B and C is 4, 3 and 8 respectively, from plant 2 to A, B and C is 7, 5 and 9 respectively and from plant 3 to A, B and C is 4, 5 and 5 respectively. Provide recommendation to both the supplier and the user.