An arts academy requires there to be 3 teachers for every 75 students and 6 tutors for every 72 students. how many tutors does the academy need if it has 120 students?

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?