So here it is like this
three guys, flatmates go to buy a stereo for $30, they pay $10 each and split, the shopkeeper sees that his assistant has sold it for $30 when it is on sale for $25, he gives the assistant the $5 difference to take back to the three guys, walking along he finds he cant split the $5 three ways evenly so he takes $2 for himself, finds the guys and gives them $1 each, the now have paid $9 each, $27, the assistant has $2 dollars, $29 ?? 333