This value indicates the quantity of items in the order line item related to the case. This value is usually '1', but can be more if the buyer bought multiple items at the same time from the same fixed-priced listing.
See the Field Index to learn which calls use caseQuantity.
The date by which the next action in the case must be made either by the user (caller) or other party involved in the case. This field is only returned if a response or payment is due from the user or the other party involved in the case.
See the Field Index to learn which calls use respondByDate.