barrel are shown. Develop and solve a linear programming model to maximize contribution to profit. Let Ri= the number of barrels of input i to use to produce Regular, i=1,2,3 Si= the number of barrels of input i to use to produce Super, i=1,2,3 If required, round your answers to one decimal place. For subtractive or negative numbers use a minus sign even if there is a + sign before the blank. (Example: -300 )