Transport LP model formulation The Alfa company produces a single item in three plants, P$1,$ P$2$ and P$3.$ The company's monthly production capacity is limited to $1,600$ units per month at each of the plants. The company has two wholesale customers whose monthly demands are $1,100$ and $1,300$ units, respectively. The shipping costs to the $2$ wholesale customers that the company has are given by the following table. $12$ P$13010$ P$21525$ P$32030$ Develop a transportation linear programming model for the company.