Use reasoning to lead to the answer of the following question:
After negotiating for the price of a phone, Karsyn bought a phone at 20% of the initial price. If the phone's initial price was $600, calculate how much she paid after negotiating.

480
If the initial price was $600, after negotiating the price, Karsyn paid 20 / 100 * $600 = $120 less.

The price at which she bought the phone is $600 - $120 = $480.

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The answer is 480