Here’s how the puzzle goes:
- You obtain a cow for $800.
- You sell the cow for $1000, building a revenue of $200.
- You buy the cow once more for $1100, but considering that you previously designed a gain of $200 from the first transaction, your efficient charge for the 2nd buy is lowered to $900.
- Ultimately, you sell the cow once more for $1300, earning a income of $400 ($1300 – $900).
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