Steinwelt Piano manufactures uprights and consoles in two plants, Plant I and Plant II. The output of Plant I is at most 300/month, whereas the output of Plant II is at most 250/month. These pianos are shipped to three warehouses that serve as distribution centers for the company. To fill current and projected orders, Warehouse A requires a minimum of 200 pianos/month, Warehouse B requires at least 150 pianos/month, and Warehouse C requires at least 200 pianos/month. The shipping cost of each piano from Plant I to Warehouse A, Warehouse B, and Warehouse C is $65, $65, and $85, respectively, and the shipping cost of each piano from Plant II to Warehouse A, Warehouse B, and Warehouse C is $85, $75, and $55, respectively. Use the method of this section to determine the shipping schedule that will enable Steinwelt to meet the warehouses' requirements while keeping the shipping costs to a minimum. Plant I to Warehouse A 60 X pianos Plant I to Warehouse B 60 X pianos Plant I to Warehouse C 80 X pianos Plant II to Warehouse A 80 X pianos Plant II to Warehouse B 70 X pianos Plant II to Warehouse C 50 X pianos What is the minimum cost? $ 300