total paid by EACH guy is $9... total paid by all 3 together is $27 if the waiter pocketed $2 then yes there is a missing $1 but... seeing as $30 minus $5 = $25 +$1x3 = $28 then the $2 pocketed by waiter makes the total $30 even... the answer is now the plane wont take off, and NO the nozzle wont still pump gas a mile down the road!!!
Refund Amount $5 / 3 = $1.6666 $1.666 - 1 = $.6666 balance after refund $.6666 * 3 = $1.9998 Greddy wait staff