A lady bought goods worth ₦200 and paid the shopkeeper with a ₦1000 Note.
The Shopkeeper had no change on him so he
went to another Shopkeeper John his neighbour and collected ₦1000 change in ₦200 denominations, with which he settled the lady and she left.
A little while later, John came back angrily after
he discovered the ₦1000 note he was given by
the shopkeeper was fake, and demanded a
replacement. To avoid trouble, the shopkeeper
had to give John another ₦1000 and destroyed the counterfeit which had no real value.

So Question for the genius...
How much has the Shopkeeper lost in total?

N2000