Which of the following must be included on the invoices furnished by the Contractor?

The correct answer highlights the essential components that must be clearly stated on invoices provided by the Contractor. Including a unique invoice number serves as a reference for transaction tracking and payment processing, ensuring that both the Contractor and the client can easily identify individual invoices. The specific invoice date is crucial as it indicates when the service was rendered or the billing period, which helps in managing payment timelines. Additionally, including the contract price on the invoice ensures transparency and confirms the agreed-upon amount for services rendered, aiding in avoiding misunderstandings or disputes over charges.

Each of these elements plays a significant role in the professional management of invoices, allowing both parties to maintain accurate records and facilitating the efficient processing of payments. It is important for invoices to have a standard format that clients can expect, which often includes these critical details to uphold professionalism and clarity in financial transactions.