Horse Selling Problem

Question

A man bought a horse for $60. He then sold it for $70. He then bought it again for $80. Finally, he sold the horse for $90. Did the man make a profit? If so, how much profit did he make?

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Answer 1

buys for 60, sells for 70 means 10 profit

buys for 80 sells for 90 means another 10 profit

total profit = 10+10 = $20

assume he had $100 to spend

he buys for $60 and then has $40+1 horse.

he then sells for $70 and now has 40+70=$110, he's ahead by $10 over his original $100

then he buys it back for $80. he now has $30 + 1 horse

he sells for $90 and now has $120, $20 more than his original $100