thank you, Stefan
why are you adding the $2 to the $27, Steve?
they need to be subtracted, because they're not in addition to what the three men paid - they're simply what they didn't get - They paid $27 instead of the $25 - he pocketed the difference
the $30 you keep referring to - well, let's take it from there: $30 minus the three the men got leaves $27, right? then minus $2 (for the clerk) makes it $25
I'll never make a good teacher; I have the impulse to shake someone