The ratio of fruit juice to sparkling water in a punch recipe is 523 for a party the host needs to make 240 ounce a punch how many ounces of the fruit punch does he need

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?