Prepare the purchasing decision
Synthetic agreed discount is HKD 5 per unit on L1 only. L1 has four units at HKD 20; L2 has three at HKD 30 and no discount. The eligible net total is HKD 150. An invoice discounting all seven units would show HKD 135 and conflict with the recorded term. No tax or percentage rounding is involved.
| Line | Base HKD | Discount HKD | Expected net HKD |
|---|---|---|---|
| L1 / 4 units | 4 × 20 = 80 | 4 × 5 = 20 | 60 |
| L2 / 3 units | 3 × 30 = 90 | 0 | 90 |
| Total | 170 | 20 | 150 |
Complete the recorded outcome
- Read the agreed discount’s line reference and unit basis.
- Calculate each eligible line’s net amount.
- Record any invoice scope difference for clarification.
A label saying “discount” without its eligible lines is insufficient to choose a whole-order calculation.
What difference does the incorrect HKD 135 invoice create?
Show the worked answer
HKD 15 below the expected 150: three L2 units incorrectly received 5 each. Clarify the new offer or correct the invoice; do not silently amend the term.
The result is a pricing consistency check, not advice that a buyer must pay a particular amount.