You only need to set up the model. Van 1 can hold 6 animals, which can include at most 2 camels, at most 1 yak and at most 4 moose. Van 2 can carry 7 animals, which can include at most 3 camels, at most 2 yaks and at most 3 moose. Oilco has oil fields in Los Angeles and San Diego. The Los Angeles field can produce up to 400,000 barrels per day, and the San Diego field can produce up to 500,000 barrels per day.
Oil is sent from the fields to a refinery, either in Dallas or in Houston.
Each refinery has a capacity of 500,000 barrels per day. Refined oil is shipped to customers in New York and Chicago. New York customers require 300,000 barrels per day of refined oil, and Chicago customers require 400,000 barrels per day of refined oil. Each day, at most 300,000 barrels can be shipped directly from Dallas to Chicago, and at most 200,000 barrels can be shipped between New York and Chicago. Determine how Oilco can minimize the cost of meeting its demands.