A major coffee supplier has warehouses in Seattle and San José. The coffee supplier receives orders from coffee retailers in Salt Lake City and Reno. The retailer in Salt Lake City needs 400 pounds of coffee, and the retailer in Reno needs 350 pounds of coffee. The Seattle warehouse has 700 pounds available, and the warehouse in San José has 500 pounds available. The cost of shipping from Seattle to Salt Lake City is $2.50 per pound, from Seattle to Reno $3.50 per pound, from San José to Salt Lake City $2 per pound, and from San José to Reno $2.50 per pound. Find the number of pounds to be shipped from each warehouse to each retailer to minimize the cost.