Set up a system of equations describing the following word problem. Be sure to specify what each variable represents.
5 ounces of dark chocolate and 11 ounces of milk chocolate combine to form one pound of 52.5% chocolate. Eight ounces each of dark and milk chocolate combine to form one pound of 60% chocolate. What percent chocolate are the dark and milk chocolate being used? Bonus question: dark chocolate kicks milk chocolate's behind. Okay, so the bonus question wasn't actually a question, but now you know where we stand.