One stranger approached Ah Beng and asked to exchange a $100 note with smaller notes.

So Ah Beng gave the stranger 10 x $10 notes in exchange.

Then Ah Beng used the $100 note (which he got from the stranger) to buy a box of $5 ice-cream and got $95 in smaller notes back from the shop owner.

As Ah Beng was leaving the shop, the shop owner discovered that the $100 note is fake and demanded the ice-cream and his money back.

So Ah Beng took back the fake $100 note and gave back the box of ice cream and a real $100 note from his wallet to the shop owner.

So, in the end, how much did Ah Beng lose in total?