Calvin paints pictures and sells them at art shows. he charges $ 56.25 for a large painting. he charges $25.80 for a small painting. last month he sold six large painting and three small paintings. how much did he make in all?

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?