The Sureset Concrete Company produces concrete in a continuous process. Two ingredients in the concrete are sand, which Sureset purchases for 30.62 dollars per ton, and gravel, which costs 77.03 dollars per ton. Sand and gravel together must make up exactly 76 percent of the weight of the concrete. Furthermore, no more than 44 percent of the concrete can be sand, and at least 27 percent of the concrete must be gravel. Each day 2,237 tons of concrete are produced. a) How many tons of sand and gravel should Sureset plan on purchasing each day so that the total cost is minimized? Tons of Sand = Number Tons of Gravel = Number b) What will be the total cost of sand and gravel each day? Total Cost = Number