Well what you would do is you would first subtract 45 from 325 (325-45) and that would become 280. Then you would divide that number by 8 (the cost of the T-shirt)(280/8) and then your answer would be 35. So the maximum number of T-shirts she will be able to buy is 38. Hope this will help you!
Ok, so: Since the delivery charge is $45, we need to minus 325-45= 280. Now, we divide 280 divide 8= 35, so they could buy 35 t-shirts. hope this helps!