1. **State the problem:** Calculate the refund rate and aftersale rate based on the given payment amounts and reasons. 2. **Identify refund reasons:** Typically, refund reasons include client errors (change of mind, wrong choice), wrong address, lost packages, wrong/repeat orders, and incomplete goods. 3. **Identify aftersale reasons:** Aftersale issues often include overdue dispatch, seller overdue dispatch, seller out of stock, and seller confirmed out of stock. 4. **Sum payment amounts for refund reasons:** - Wrong/repeat order: 1059 - Client wrong choose (size, color, quantity): 779 + 654 + 1584 = 3017 - Wrong address/phone: 779 - Change of mind (don't need it): 729 + 963 + 1169 = 2861 - Package Lost: 542 - Goods incomplete (less dispatch): 244 Total refund amount = 1059 + 3017 + 779 + 2861 + 542 + 244 = 8502 5. **Sum payment amounts for aftersale reasons:** - Overdue dispatch 10 days: 2628 + 724 + 6308 + 2129 + 531 + 808 + 2769 + 1729 = 17826 - Seller overdue dispatch: 1928 + 513 + 218 + 4578 + 939 + 3329 + 828 = 12333 - Seller out of stock: 5579 + 768 = 6347 - Seller confirmed out of stock: 479 Total aftersale amount = 17826 + 12333 + 6347 + 479 = 36985 6. **Calculate total payment amount:** Sum all payment amounts given: 2628 + 1928 + 1059 + 724 + 6308 + 513 + 244 + 218 + 779 + 779 + 2129 + 531 + 4578 + 729 + 654 + 808 + 479 + 939 + 5579 + 3329 + 542 + 768 + 828 + 1584 + 963 + 2769 + 1729 + 1169 = 55488 7. **Calculate refund rate:** $$\text{Refund Rate} = \frac{\text{Total Refund Amount}}{\text{Total Payment Amount}} = \frac{8502}{55488} \approx 0.1531 = 15.31\%$$ 8. **Calculate aftersale rate:** $$\text{Aftersale Rate} = \frac{\text{Total Aftersale Amount}}{\text{Total Payment Amount}} = \frac{36985}{55488} \approx 0.6663 = 66.63\%$$ **Final answers:** - Refund Rate = 15.31% - Aftersale Rate = 66.63%