15. Mr. Savage decides to treat the whole class to hotdogs and milkshakes. Being a mortal man who can only carry so many hotdogs and milkshakes, Mr. Savage picks up two separate orders. The first order consists of 13 hotdogs and 11 milkshakes, costing a total of $95.00. The second order consisted of 9 hotdogs, 14 milkshakes and an extra iced coffee, costing a total of $100, including Mr. Savage's $5.50 iced coffee. Using matrices, solve to find the cost of an individual hotdog and milkshake.