2. Students are selling grapefruits and nuts for a fundraiser. The grapefruits cost $1 each and a bag of nuts cost $5 each. They sold 80 items and made $200. The graph of the number of items sold is given and the equation is x+y=80, where x represents the number of grapefruits sold and y represents the number of bags of nuts sold. a. Write an equation for the amount of money they made from selling grapefruits and nuts​