qualifier number + unit a measured amount
down-payment amount
The up-front amount paid before an instalment financing plan's recurring payments begin — a numeral with a currency unit (reuses Currencies). A qualifier of `installment_plan` (cardinality one); absent means no down-payment.
Down-payment amount is a price, given as an amount in a currency such as USD or EUR.
It is a qualifier of instalment plan — it has meaning only inside a instalment plan statement, one per statement, never on its own. It belongs with instalment plan to subscription & financing — one facet of a product.
It is answered inside every instalment plan statement, not as a standalone question on a kind.
Answered inside every instalment plan statement — not a standalone slot on any kind.