| Keyword: | ∇ Name: | Description: | ∇ Type: |
| Discount | purchasl.lng | General Purchasing model | LINGO |
| Discount | QdiscSupL.lng | Buying with quantity discounts | LINGO |
| Discount | purchasx.xls | General Purchasing model | What'sBest! |
| Discount | QDiscBid01.xlsx | Choosing vendors | What'sBest! |
| Discount | QdiscSup.xlsx | Buying with quantity discounts | What'sBest! |