Find the minimum value of c=4x+3y subject to the following constraints: x>=0, y>=0, 2x+3y>=6, 3x-2y<=9, x+5y<=20

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?