An estate agent sells three houses in one week.
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The first house sells for £200,000, and the agent earns a 3% commission.
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The second house sells for double the price of the first, but the seller negotiates the commission down to 2%.
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The third house sells for half the price of the first, but the seller agrees to a 5% commission.
The agent’s total commission for the week is exactly the same as if they had charged a flat 3% commission on all three houses at their actual selling prices.
Question: What was the selling price of the third house?