[fintstone]

Originally Posted by Sooner or later

There is no missing dollar. Only poor methodology.
25 in the cash register
2 bucks in the managers pocket.
3 bucks returned to the customers.
$30

You are marking this WAY too difficult.

Just making it accurate...and my answer was absolutely correct (unlike the other). Adding the 3 dollars twice (instead of 3 and 2) because of the earlier mistake is not the answer in the math.

The net was not $27 ($9 apiece) before the tip, it was $9.34 with the net of $28 That is where the original problem lost the dollar which was where the problem was. Then adding the tip gives you thirty.

Working a problem backwards to make it work once you have the answer is good if you know how to work the problem to start with. It does not work otherwise.