Max is shopping for breakfast cereal at the supermarket. He wants to determine which two cereals are in a proportional relationship according to their cost-to-size ratio. Cereal Cost Size
Cereal A $3.36 16 oz
Cereal B $3.42 18 oz
Cereal C $4.20 20 oz
Calculate each cereal's cost-to-size ratio, in dollars per ounce.

Which two cereals are in a proportional relationship? (List them in alphabetical order.)

Cereal
and Cereal

What is the cost-to-size ratio, as a decimal, for these two cereals?
$___
per ounce.