Margie and her sister wanted to purchase a bag of popcorn for movie night. They compared the prices and sizes of four bags of popcorn. Pop-A-Lot Pop Kornz Pop-arazzi Kernels Popcorn Size 7 ounces 8 ounces 17 ounces 3 ounces Cost $3.50 $4.25 $7.49 $2.09 Part A: Calculate the corresponding unit rate for each package. (2 points) Part B: Interpret what the unit rates found in Part A represent. (1 point) Part C: Choose which package is the best buy. (1 point)