The Furry Dog Fundraiser cost $1.20 per stuffed dog toy plus $26.40 for extra
expenses.
Which expression would represent the costs of the Furry Dog fundraiser?

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?