Bundle Math — Effective Quantity
When a product has bundle options (Components, Fixed Price Components, or Accessories), Pinion needs to decide how the parent bundle’s quantity relates to each option’s quantity.
The rule
| Option type | Effective quantity on the line item |
|---|---|
| Component | parent quantity × option quantity |
| Fixed Price Component (FPC) | parent quantity × option quantity |
| Accessory | option quantity (no multiplication) |
Worked example
A customer orders 3 units of a “Hardware Bundle” parent. The bundle contains:
- 1 Component “Power Supply” with option quantity 2
- 1 Accessory “Cable Kit” with option quantity 2
After Pinion saves the lines:
| Line item | Quantity stored on the line | Why |
|---|---|---|
| Hardware Bundle | 3 | parent quantity |
| Power Supply | 6 | Component → 3 × 2 = 6 |
| Cable Kit | 2 | Accessory → no multiplication |
The Product Display tab shows the same effective quantity (6) on the “Power Supply” row. Hover the quantity number to see the breakdown: “Effective quantity = parent quantity (3) × option quantity (2) = 6.”
Why this matters
Related
- Pricing Models — how the parent total relates to the child line totals.
- Fixed Price Components — the flat-total variant of a scaling child.
- The Universal Invariant — the equation the effective quantity feeds.