OptionaldimensionsThe dimension choices of the key, e.g. { komfort: "FA" }.
OptionalkeyMatrix group, then the dimension choices in position order. Missing on an older API.
OptionallistingOptionallistingOptionaltiersQuantity ladder of the class row ([{ minQty, priceIncVat, priceExVat }]), only when the row has tier prices; the unit price at a quantity is the last step at or below it, as in the cart.
The product's price for one class key ("PG5:FA"), campaigns included; listing = before campaign.