Curtis Chemical Co. produces two types of weed killer; Weed Zap (ZAP) and Wipe Out Weeds (WOW). ZAP costs $2 per gallon to produce, while WOW costs $3 per gallon. To produce one gallon of ZAP, Curtis needs to use the following recipe:

mix 5 ounces of material 1; 4 ounces of material 2; and 0.5 ounces of material 3. The recipe for WOW requires 10 ounces of material 1; 3 ounces of material 2; and no material 3. The amount of material available is: 90 ounces of material 1; 48 ounces of material 2; and 1.5 ounces of material 3.