The norwood tigers are having team shirts made. one option is to pay harold's tees a $41 setup fee and then buy the shirts for $10 each. another option is to go to city printing, paying $36 for a setup fee and an additional $15 per shirt. the team parent in charge of the project notices that, with a certain number of shirts, the two options have the same cost. what is the cost? how many shirts is that?