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Variable name | Description |
|
| The number of potential customers |
| The maximum number of products that can be recommended |
| The product (with shipping-fee discount) |
| The price of the product |
| The cost of the product |
| Customer’s reservation price of product |
| The current shipping fee of product |
| The cost of shipping fee |
| Customer’s reservation price of shipping fee |
| The set of substitutes of product |
| The substitute of product , |
| Total number of substitutes for product |
| The price of product , |
| The cost of the product |
| Customer’s reservation price of |
| Customer’s reservation price of product with recommendation |
| The set of complements of product |
| The complement of product , |
| Total number of complements for product |
| The price of product , |
| The cost of the product |
| Customer’s reservation price of product |
| Customer’s reservation price of product with recommendation |
| The set of independent products of product |
| The independent product relative to product , |
| Total number of independent products relative to product |
| The price of product , |
| The cost of product |
| Customer’s reservation price of |
| Customer’s reservation price of product with recommendation |
| Discount demands of shipping fee in sales volume |
| Profit gains from customers |
|