Breh, the premise of a shop is buying goods from a supplier (meaning you're already -$)
And then selling it to a customer to recuperate your loss (break even) and gain a profit.
It's not like I'm pulling this assumption out of thin air.
And that's why I said the shopkeeper has lost APPROX $160 give or take the original costs of product.
Yea, but it's assumption that's not specified in the problem. It's not a part of the problem....you're basically pulling it out of thin air.
You could drive yourself crazy if you try to solve word problems by bringing in your own, assumed, outside information.

@ the irony.

