Lizzy: 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?.
Me: Hmmm, let me think. I think this is the detailed solution:
They have 112 + 139 = $251. The passes cost 6 * 28 = $168. They have 251 - 168 = $83 left. Final answer: 83.