# Find the missing dollar [duplicate]

• Hint: Sources $=24+24+24=72$. Sinks $= 70+2$. Oldie at math.stackexchange.com/questions/15524/… – Macavity Jul 2 '15 at 12:36
It does not make much sense to add the $72\$$and the 2\$$. Each customer paid$24\$$(=25-1), so the waiter has 72\$$, two of which he pockets. The owner is left with $70\$$for the food. There's actually nothing strange in my opinion, the mistake is to assume 75 to be the cost. The cost indeed is$75-5+2 = 72$which is$\$24$ per head.