John goes to the market with €100. He buys a roast for €17 and vegetables for €11. How much money does he have left? Think carefully first, then make a decision:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
He spent 17 + 11 = €28. So, he still has 100 – 28 = €72 remaining. So, the answer is 72.