You purchase 1.5 pounds of bananas for $0.59 per pound and 4.23 pounds of apples for $0.89 per pound. what is the total cost of the fruit? *round the answer to the nearest cent*

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.