Keep each line’s source visible
Synthetic I-31 has three units from P1/L1 at HKD10 and two from P2/L3 at HKD20. Total is HKD70. Each line has a source disclosure, with no invoice approval or payment event.
| Input or inspection | Expected view | Business meaning |
|---|---|---|
| Inspect line A | P1/L1 · 3 × 10 = 30 | First source supports A only |
| Inspect line B | P2/L3 · 2 × 20 = 40 | Second source remains linked |
| Inspect total | HKD70 with both references | Total does not replace line links |
Follow a source from the line that uses it
- The disclosure summary names both invoice line and purchase line.
- Amounts are shown with the fixture currency.
How much of the invoice belongs to P2?
Show the worked answer
Two units and HKD40. P1’s HKD30 cannot support the whole HKD70.
Opening a source does not allocate new receipt quantity or approve the invoice.