Problem 4.13. A company has three factories X, Y, and Z and four warehouses A, B, C, and D. It is required to schedule factory production and shipments from factories to warehouses in such a manner so as to minimize total cost of shipment and production. Unit variable manufacturing costs (UVMC) and factory capacities and warehouse requirements are given below: From UVMC To warehouses Capacity in units per month. Factories. RS. Unit shipping costs in Rs. A B C D 10 1 2 75 Y 11 1 3 32 12 4 3 3 67 Requirement: 65 24 16 15 Find the optimal production and transportation schedule