Olivia and Nigel are traveling in Asia.  Olivia has $112 and Nigel has $139. If together they buy six one day passes to a tourist attraction for $28 per ticket, how much money do they have left?
They have 112+139=$<<112+139=251>>251
The passes cost 6*28=$<<6*28=168>>168
They have 251-168=$<<251-168=83>>83 left.
#### 83