A14 pound bag of dog food cost $16.24 and a 30 pound bag of dog food cost $33.30 which statement is true and can be used to determine the better buy?

a. the unit rate per pound of a 14 pound bag $0.05 less than the unit rate of a 30 pound bag.

b. the unit rate per pound of a 14 pound bag is $0.05 more than the unit rate of a 30 pound bag.

c. the unit rate per pound of a 14 pound bag is $0.50 less than the unit rate of a 30 pound bag.

d. the unit rate per pound of a 14 pound bag is $0.50 more than the unit rate of a 30 pound bag.