 
<translate> Idan farashin farko ya kasance $ 600, bayan tattauna farashin, Karsyn ya biya 20 / 100 * $ 600 = $ 120 ƙasa. Farashin da ta sayi wayar shine $ 600 - $ 120 = $ 480. Amsar ƙarshe: 480. <eng> 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. The final answer: 480. 