Answer :
From given information we get
A women went to a shop and gave the shopkeeper a note of Rs . 1000
And Shopped for Rs. 200 , And as shopkeeper A gets change from shopkeeper B , So now
Shop keeper have 10 notes of Rs 100 and Shopkeeper have Rs . 1000 note ( Fake )
Now shopkeeper A gave 800 to women and he left with 1000 - 800 = Rs . 200
And
After sometime Shopkeeper B wants his money back So , He gave him to Rs . 1000
So,
Shopkeeper have loss of Rs . 800 and Cost price of his product of Rs . 200 that he sold it to women . ( Ans )