Nicole is prepping trail mix to sell at a fundraiser she has 35 oz of banana chips she buys a sea bag of cranberries and our bags of raisins continue 24 oz of dry food each she mixes all the ingredients together and mix 4 oz of serving costing $1 and 25 each the expression The total sales in dollars of trail mix at the fundraiser create an expression 1.25(35+24(c+r)/4) that represents the total sales in dollars of pro mix if increases the size of each serving by 2 ounces and cost per serving by zero.70 cents