1. The terms "aftersale rate" and "refund rate" typically refer to business metrics related to customer returns and refunds. 2. The "aftersale rate" often means the percentage of products sold that result in some form of aftersale service, such as returns, exchanges, or repairs. 3. The "refund rate" is the percentage of sold products for which customers receive a refund. 4. To calculate these rates, you use the formulas: $$\text{Aftersale Rate} = \frac{\text{Number of aftersale cases}}{\text{Total number of sales}} \times 100\%$$ $$\text{Refund Rate} = \frac{\text{Number of refunds}}{\text{Total number of sales}} \times 100\%$$ 5. These rates help businesses understand customer satisfaction and product quality. 6. Without specific numbers, we cannot compute exact values, but these formulas provide the method to find them.