Please help me solve this. The system says this is wrong.

A certain company produces clothing, footwear, and accessories for dancing and gymnastics. They produce three models of pointe shoes used by ballerinas to balance on the tips of their toes. The shoes are produced from four materials: cardstock, satin, plain fabric, and leather. The number of square inches of each type of material used in each model of shoe, the amount of material available, and the profit/model are shown. Complete parts a and b. Model 3 15 Material Cardstock Satin Plain Fabric Leather Profit per model Model 1 13 23 40 12 $51 Model 2 10 20 40 12 $46 21 30 Material Available 1,300 2,000 8,500 1,100 10 $39 b. Mathematically formulate a linear optimization model. (Type integers or decimals. Do not round. Do not include the $ symbol in your answers.) Maximize Profit = 51 M2 + 43 M2 + 39 M2 13 M1 + 10 M2 + 15 M3 = 1,300 23 M1 + 20 M2 + 21 M3 = 2,000 13 M2 + 10 M2 + 15 M3 S 1,300 23 My + 20 M2 + 21 M3 $2,000 40 M2 + 40 M2 + 30 M3 38,500 12 M2 + 12 M2 + 10 M3 S 1,100 M1, M2, M3 2 0