[Translation from Japanese to English ] I am very sorry. I misunderstood the price and purchased the item But I...

Original text

申し訳ございません。

私は誤った金額でその商品を購入してしまいました。
私は３２５ドルではなくて、２８０ドルで購入したい。
まだ支払いを行っていませんので、取り消しをお願いできないでしょうか？
取り消し後、改めて２８０ドルで購入致します。

よろしくお願い致します

Translation / English

I am very sorry.
I misunderstood the price and purchased the item But I want to buy it atthe price of $280 not at $325 you proposed. I haven’t completed the payment yet, so could you accept my cancellation for the item?
And I want to buy it anew at $280. Is it OK?
Thank you.

Translation / English

I'm sorry.

I committed to purchase the item with a wrong price.
I'd like to buy it for $280, not $325.
I still haven't payed yet so could you cancel my order?
I will pay you $280 after cancellation.

Thank you.