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:

Silk-Screen Company T-shirt Factory 4. Miami 5. Atlanta 6. Houston Supply (1,000s) 1. Mexico $4 $6 $3 18 2. Puerto Rico 3 5 5 15 3. Haiti 2 4 4 23 Silk-Screen Company Distribution Center 

7. New York 

8. St. Louis 9. Los Angeles 4. Miami $ 5 $ 7 $ 9 5. Atlanta 7 6 10 6.

Houston 8 6 8 Demand (1,000s) 20 12 20 Determine the optimal shipments to minimize total production and transportation costs for the apparel company.