Simon bought 5 boxes of cereal c and 2 gallons of nonfat milk m for $20.08. Terri bought 3 of the same boxes of cereal b and 3 gallons of nonfat milk m for $18.87. Based on this information, what is the cost of one gallon of milk?

Answer Choices:
$2.50
$3.79
$3.75
$3.50