A farmer buys a horse for $60. He sells it to his neighbor for $70. Then he discovers he could have made a better deal. He borrows $10 from his wife, and buys the horse back for $80. He then sells it to another neighbor for $90. How much money did he make?
70$ (money he makes on the horse the first time) - 60$ (what he paid) = 10$ -10$ (the money he borrows) = 0$ - 80$ (he bought the horse back) = -80$ + 90$ = 10$ (positive)
The money that should be made is $10.
Given that,
Based on the above information, the calculation is as follows:
= $70 - $60 - $10 - $80 + $90
= $10
Therefore we can conclude that the money that should be made is $10.
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