Final answer:
Billing statements or invoices are records of bill determinate calculations for a Usage Subscription, providing details on charges, usage, and the total amount due.
Step-by-step explanation:
Records of bill determinate calculations for a Usage Subscription are commonly referred to as billing statements or invoices. These records provide detailed information about the charges incurred for the usage of a subscription-based service. A billing statement typically includes the billing period, the services or products consumed, the individual unit costs, any applicable taxes, and the total amount due. Organizations use this data to understand their costs, manage their finances, and provide transparency to customers about their usage and charges.