Mrs. Roger’s class sold bottles of soda for $2.50 each and Mrs. Magoo’s class sold candy bars for $1.20 each. Together, the classes sold 63 items and earned $102.90 for their school.
(a) Write and solve a system of equations that model the problem. Show all your work.
(b) Which class earned more money?
(c) How much more money did that class earn?