2014 AMC 8 Problems/Problem 3

Isabella had a week to read a book for a school assignment. She read an average of 36 pages per day for the first three days sand an average of 44 pages per day for the next three days. She then finished the book by reading 10 pages ont eh last day. How many pages were in the book?

$\textbf{(A) }240\qquad\textbf{(B) }250\qquad\textbf{(C) }260\qquad\textbf{(D) }270\qquad \textbf{(E) }280$