My cupcake recipe makes 12 cupcakes and requires 3/2 sticks of butter. i can only buy whole sticks of butter. how many whole sticks of butter must i buy to make 100 cupcakes?

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?