A shopping mistake
If you like figuring out accounting errors then todays puzzle, a shopping mistake, will be right up your street.
A lady was buying some furniture for her house and the bill came to $70.
As she was in a rush when she had left home she had forgotten to bring her reading glasses and so she gave the shopkeeper what she thought were two $50 notes. She actually gave the shop keeper two $100 notes.
Unfortunately the shop keeper was busy dealing with another shopper at the same time as he was trying to deal with the lady shopper. Because he was distracted he gave the lady what he thought were three $10 notes. He actually gave her three $50 notes.
Between the lady and the shop keeper who ended up better off than they should?
The lady actually is the lucky one. She comes away with $20 more than she should.
If you work out that the lady parted with $200 but got $150 in return giving her $70 worth of furniture and $150 dollars of cash. She therefore gains $220 of cash and stock from the transaction whilst only paying $200 giving a gain of $20. The shop keeper gains $200 in cash from the lady but loses $150 in cash and his stock of $70. In total he loses $220 worth of cash and goods and only gains $200 so is out of pocket by $20.