The entry fee for a charity event is $15 per pair of people. The fee can be paid in cash or by collecting and turning in soda can tabs. Every 10 tabs
collected earns $0.01.
Brian and Eva are collecting tabs to pay their entry fee. So far, Eva has
collected 7,100 tabs and Brian has collected 1,300 tabs. What is the
least number of tabs they must still collect in order to have enough to
pay the entry fee?