Which two items are information sources from the payer?

The correct answer highlights the concept of payment terms as a key information source from the payer in the context of sales and invoicing processes. Payment terms are essential for defining the conditions under which payments are to be made, including the timeframe, discounts for early payments, and penalties for late payments. This information is critical for the seller to manage cash flow and financial planning, and it is typically established during the contractual or ordering phase of the relationship with the payer.

The other items listed, while they are related to sales and logistics, do not directly profile information sourced from the payer. Invoicing list scheduling relates more to the seller's internal processes of managing billing rather than direct input from the payer. Similarly, order quantity and shipping details are aspects of the fulfillment process and logistics coordination rather than payment-related details. Thus, the relevance of payment terms as an explicit piece of information from the payer is highlighted by its crucial role in shaping the financial and operational interactions between the buyer and seller.