Solve this simple math problem (you may not get it right :D)

[chesebert]

You are a headphone seller.
You bought a headphone for $80 and plans to sell it for $90
A customer bought the headphone, and gave you $100.
You don't have any changes so you went to the neighbor store to change $100 for 20s and 10s
You gave $10 change to the customer.
Later that day, the neighbor told you that the $100 you gave them was fake, so you gave them another $100.

How much are you in the red? (please give a short explanation)

HAVE FUN

NOTE: the $100 you gave the neighbor store to get changes was the $100 you received from the customer. Seems like some one was confused about this. (I thought this wasn't an issue as its a general practice

ＥＤＩＴ：　Please make a note that you are a headphone dealer (say headroom for example) not a individual seller. I hope the hint helps.

 

[Dimitris]

190 maybe?

 

[VicAjax]

$190?

 

[choariwap]

down by 90

 

[Iron_Dreamer]

Quote:

Originally Posted by choariwap down by 90

-80
+90
-100
____
-90

That's what I got.

 

[m_memmory]

$190 is what I think too.

 

[Kirosia]

I got 42.

 

[Zanth]

Down $80 for original purchase (but have headphones in hand worth $80 at least). So even really.

Want to sell for $90 (a plus of $10) but instead gets $100 (a plus of $20) yet required to give $10 in change (a minus of $10). At this point one is still up $10 theoretically until one finds out the $100 given was fake, thereby requiring a new loss $100, so total cash loss is $110, but the phones aren't around either...meaning $80 worth of phones are missing. $190 total out of pocket loss. Hard day dealing on the street, thanks for playing!

EDIT: I miscalculated the amount returned from the store clerk, so my answer is $90, though after discussing with the OP, and knowing the real one now, I am still wrong, but I would fight it out that $90 is more correct mathematically than the actual answer.

 

[chesebert]

haven't seen a correct answer yet

mwahahaha

keep on guessing. There is a right answer of course.

 

[Jubei]

I have $190 too.

 

[Kirosia]

If the hundred bucks the customer gave you was fake, couldn't just go kick his ass and take the headphones back? Hell, jack his wallet too, person needs to learn a lesson.

 

[jbloudg20]

Quote:

Originally Posted by Kirosia I got 42.

classic

 

[Jubei]

Okay . . . 2nd guess = $90??

 

[pne]

Quote:

Originally Posted by chesebert Later that day, the neighbor told you that the $100 you gave them was fake, so you gave them another $100. How much are you in the red? HAVE FUN ＥＤＩＴ：　Please make a note that you are a headphone dealer (say headroom for example) not a individual seller. I hope the hint helps.

so did you get the original 100 back in exchange for the new 100? did you know it was fake hence not counting it as part of the money?

 

[Zanth]

Meh, my brain farted today and I missed the obvious. Went back for a second go, confirmed with a colleague and then confirmed chesebert. The answer is out there. But it sure ain't $190