A clothing distributor has four warehouses that serve four large cities. Each warehouse has a monthly capacity of 5,000 blue jeans. It is considering using a transportation LP approach to match demand and capacity. The following table provides data on shipping cost, capacity, and demand constraints on a per-month basis. Develop a linear programming model for this problem. (Let xij represent the flow from warehouse i to city j.) Min xij>0 for all i and j