Example, Business Cards printing.
| Units | 1 side without plastic | 2 side without plastic | 1 side with plastic | 2 side with plastic | round corners |
| 100 | 5⬠| 7⬠| 8⬠| 10⬠| +5⬠|
| 200 | 7⬠| 9⬠| 10⬠| 12⬠| +5⬠|
| 300 | 9⬠| 11⬠| 12⬠| 14⬠| +5⬠|
etc. So many variations.
What is the right way to set purchase and sale price lists?