| Merchants Tourist | The quality product | The product of inferior quality |
| Cost P11 | S1 − P12, P12 − C1 |
|
| Cost P12 | S1 − P12, P12 − C1 | |
| Cost P21 |
| S2 − P21, P21 − C2 |
| Cost P22 | S2 − P22, P22 − C2 |