Two guys robbed a rob a bank and mess it up, managing to escape with two sacks that they find on the floor. And they take one sack each.
After awhile they meet again and one asks the other, 'What did you find in your sack?'
'50 gold pieces!' 'Wow... that's a lot! What did you do with the cash?' 'I bought a house. How about your sack?' 'Bah... it was full of bills.' 'And what did you do with them?' 'Eh, well... little by little, I'm paying them off...'