You purchase a bag of chocolate chips for $$3,$ a bag of flour for $$1,$ a bag of sugar for $$\mathrm{.}50,$ a half dozen eggs for $$\mathrm{.}50,$ and a half pound of butter for $$2.$ You use all these ingredients to make three dozen cookies. Your roommate offers you $$15$ for them, and you happily accept. How much does this process contribute to GDP$?$ Multiple Choice $$7$ $$15$ $$22$ $$8$