What does the 'amount due' encompass in financial terms?

The 'amount due' in financial terms refers to the total balance that must be paid by a buyer for a purchase, which includes all pertinent charges. This is most accurately represented by the option indicating that it encompasses all extended prices, tax, and delivery charges.

When calculating the total amount due, one needs to consider the sum of the extended prices of all products purchased, which accounts for the unit price multiplied by the quantity. Additionally, applicable sales tax must be added to comply with local tax regulations. Delivery charges, which cover the costs associated with shipping the products to the customer, are also included in the overall amount due.

This comprehensive approach ensures that the customer understands the complete financial obligation involved in their purchase. Subscriptions or specific fees related to shipping may contribute to costs, but they do not represent the full scope of what 'amount due' conveys in this context.