What is the digit in the one place is the sum of the digit in a dozon i know it is 12 but do i put it in on place value or the 2 or the 1 in the ones in place value

Need ! the total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?