A sports apparel company has received an order for a college basketball team€™s national championship T-shirt. The company can purchase the T-shirts from textile factories in Mexico, Puerto Rico, and Haiti. The shirts are shipped from the factories to companies in the United States that silk-screen the shirts before they are shipped to distribution centers. Following are the production and transportation costs ($/shirt) from the T-shirt factories to the silk-screen companies to the distribution centers, plus the supply of T-shirts at the factories and demand for the shirts at the distribution centers:

Determine the optimal shipments to minimize total production and transportation costs for the apparelcompany.

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Silk-Screen Company T-shirt Factory 1. Mexico 2. Puerto Rico 3. Haiti 4. Miami $4 5. Atlanta 6. Houston Supply (1,000s) 18 15 23 Distribution Center Silk-Screen Company 4. Miami 5. Atlanta 6. Houstorn 7. New York 8. St. Louis $7 9. Los Angeles 10 Demand (1,000s) 20 12 20