| Keyword: | ∇ Name: | Description: | ∇ Type: |
| Purchasing | purchasl.lng | General Purchasing model | LINGO |
| Purchasing | QdiscSupL.lng | Buying with quantity discounts | LINGO |
| Purchasing | PieceLinearSOS2a.lng | - | LINGO |
| Purchasing | PieceLinMultPer.lng | - | LINGO |
| Purchasing | purchasx.xls | General Purchasing model | What'sBest! |
| Purchasing | QDiscBid01.xlsx | Choosing vendors | What'sBest! |
| Purchasing | QdiscSup.xlsx | Buying with quantity discounts | What'sBest! |
| Purchasing | PieceWiseSOS2e.xlsx | Purchasing with a Nonlinear Price Schedule | What'sBest! |