May and Catherine bowled four games and rented two pair of shoes for a total of $23.50. Kora and her friends paid $42.25 to bowel seven games and rent five pairs of shoes. How much did it cost to bowl one game?

Last month, leonhard euler's watch kiosk at the mall had total sales of $9,489. merchandise totaling $225 was returned. the goods that were sold cost leonhard euler's $5,481. operating expenses for the moth were $992. what was the gross profit on sales?