3 nurses went to a diner for lunch (they were probably off...that's the only way you can go out to lunch).
Each one ordered a $10 meal (all included... tax, gratuities, etc). After pigging out, they paid their bill... total $30. On the way out, the cashier came running after them. "Misses, we had a special today, Meals for three, take an additional $5.00 off total check." "So here's $5.00 back."
To avoid confusion splitting the $5.00 among themselves, they concluded to give $2.00 to the cashier (as a token of gratitude for her honesty...comes cheap from underpaid nurses, you know) and split the remaining $3.00.
"That hefty meal was really inexpensive", the ER nurse exclaimed. "Yep, since we got $1.00 back each, it only cost us $9.00 each," retorted the ICU nurse. Pensively, the OR nurse pulled out her PDA and started tapping on it. "Wait a minute!" "$9.00 X 3 = $27.00 + $2.00 to the cashier = $29.00. We gave her $30.00! Where's the freakin' dollar?