[1.10] An oil refinery can buy two types of oil: light crude oil and heavy crude oil. The cost per barrel of these types is respectively \$20 and \$15. The following quantities of gasoline, kerosene, and jet fuel are produced per barrel of each type of oil. Note that 5 percent and 8 percent, respectively, of the light and heavy crude oil are lost during the refining process. The refinery has contracted to deliver 1 million barrels of gasoline, 500,000 barrels of kerosene, and 300,000 barrels of jet fuel. Formulate the problem of finding the number of barrels of each crude oil that satisfies the demand and minimizes the total cost as a linear program