A ticket seller sells 163 tickets, 549 tickets and 276 tickets in 3 days. The total number of tickets that he sells is .
The girls had 3 weeks to sell tickets for their play. In the first week, they sold a+b+2 tickets. In the second week they sold a-b-1 tickets and in the third week they sold a+b-4 tickets. How many tickets did they sell in all?