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How much money did the man make

LVRebel

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I believe it’s only a $10 profit as he buys and sells the same horse. Well, at least that’s how I read it.
As @ChicagoFats mentioned, he nets $10 profit on each of his two purchases/sales. It shouldn't matter if it's the same horse, a different horse, or what the dollar amounts are. Only the delta in the buy/sell.
 

ChicagoFats

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The original buyer incurs an additional $10 cost on himself when he buys it back the second time. He used his original $60, his profit, plus an additional $10 to buy the horse back.
Then he also incurred an additional $10 of profit when selling it for $90.

Show us your math. I showed mine.
 

Pineapple

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The original buyer incurs an additional $10 cost on himself when he buys it back the second time. He used his original $60, his profit, plus an additional $10 to buy the horse back.
You’re reading something into the problem that doesn’t exist. This isn’t a continuous transaction.

Two separate transactions that he makes $10. on in each.

Answer =$20.
 

ChicagoFats

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I'm with @QuanChi

Horse buyer applied gains on the first transaction to the second purchase and wound up netting $10 with the $90 sale.
You are incorrect.

A $10 profit is under the assumption that he did not sell the horse again. But he does sell the horse again and thus has $20 extra dollars in his pocket.



Buys Horse for $60
Sells Horse for $70
Profit $10

Buys Horse for $80
Sells Horse for $90
Profit $10

Total profit $20
 

LVRebel

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Just to humor the people saying anything other than $20.

Say you start with $100.
You buy the horse for $60. Balance: 100-60 = $40.

You sell the horse for $70. Balance: 40+70 = $110

You buy the horse for $80. Balance: 110 - 80 = $30

You sell the horse for $90. Balance: $30 + $90 = $120.

You started with $100 and now have $120. Therefore, $20 profit.
 

22*43*51

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Just to humor the people saying anything other than $20.

Say you start with $100.
You buy the horse for $60. Balance: 100-60 = $40.

You sell the horse for $70. Balance: 40+70 = $110

You buy the horse for $80. Balance: 110 - 80 = $30

You sell the horse for $90. Balance: $30 + $90 = $120.

You started with $100 and now have $120. Therefore, $20 profit.
Say you start with $70
You buy a horse for $60. Balance = $10

You sell a horse for $70. Balance = $80

You buy a horse for $80. Balance = $0

You sell a horse for $90. Balance = $10

Therefore, $10 profit.

Perhaps the beginning balance is required to understand the end balance.
 

LVRebel

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Say you start with $70
You buy a horse for $60. Balance = $10

You sell a horse for $70. Balance = $80

You buy a horse for $80. Balance = $0

You sell a horse for $90. Balance = $10

Therefore, $10 profit.

Perhaps the beginning balance is required to understand the end balance.
LOL. In your third to fourth step, you mixed up the 'balance'. If you had 0, then sold it for 90, you then have $90. Started with 70 and now have 90. What's the difference?
 
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LVRebel

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