A family wants to rent a car to go on vacation. Company A charges ​$70.50 and 18¢ per mile. Company B charges ​$40.50 and 10¢ per mile. How much more does Company A charge for x miles than Company B​?

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?