Final answer:
The input not typically part of the B/AR/CR process is customer acknowledgement. Other inputs like sales orders, shipping notices, and remittance advice are standard documents in this process. Hence, the correct answer is option (c).
Step-by-step explanation:
The question you're asking concerns the B/AR/CR process, which stands for Billing, Accounts Receivable, and Cash Receipts. In the B/AR/CR process, certain documents are used as inputs to complete various accounting and business tasks. Among the options provided, the only input that is not typically part of the B/AR/CR process is c. customer acknowledgement. This is because the process deals with the internal tracking of sales, billing, and cash receipts rather than direct customer confirmations.
The other options listed, such as a copy of the sales order, a shipping notice, and remittance advice, are all standard inputs into the B/AR/CR process. A sales order and shipping notice help in billing and recording receivables, while remittance advice is associated with the cash receipts portion when payments are received.