The trade-in fee is 5. 16X 15=77.4 yuan.

The total price is 489.2+77.4=566.6 yuan, and another 566.6 yuan needs to be paid.

If you need more help, you can consult me alone or pay attention to the contact information of "Rongdian Consignment Bank" (Baidu).

We will provide you with more suggestions about diamonds, yellow platinum and watches. thank you