Demetrius has a solid gold chain that weighs 22 grams. he also has a gold ingot that weighs 10 grams. if the current price of gold is $38 per gram, how much money will he get if he sells both the chain and the ingot?

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.