A more thorough explanation:

Definition: A single rate that applies to the transportation of several items that are of the same type or category.

Examples:

• A shipping company charges a class rate for transporting a group of books to a bookstore.
• Airlines charge a class rate for transporting a group of pets in the same cargo hold.

These examples illustrate that a class rate is a single rate that applies to a group of items that are similar in nature. In the first example, the books are all of the same type, and in the second example, the pets are all being transported in the same way. By charging a class rate, the carrier can simplify the pricing process and make it easier for customers to understand the cost of their shipment.