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 and an average of 44 pages per day for the next three days.She then finished the book by reading 10 pages on the last day.How many pages were in the book？（　　）
Isabella学校作业是一个星期读完一本书。她在前三天平均每天读了36页，接下来的三天平均每天读了44页。然后，她在最后一天读了10页并读完了这本书。这本书有多少页？（　　）