I know I don't know how to simplify or anything its ratios :(

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Find the interior angle of a regular polygon which has 6 sides

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?