Cookies Sold by Anna

During a school fundraiser, Anna sold cookies. On the first day, she sold 18 cookies. On the second day, she sold 27 cookies. After these two days, she continued to sell cookies, and by the end of the week, she had sold a total of 75 cookies. How many cookies did Anna sell after the first two days?

To solve this, first find the total cookies sold after the first two days, then subtract this from the total cookies sold by the end of the week.