2) A store sells peanut butter and jelly sandwiches for $2.25 and bologna sandwiches for $3.00. The store sells 4 less peanut butter and jelly sandwiches than double the amount of
bologna sandwiches and the total sales are $216. How many of each were sold?
I need a step by step answer

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.