Internal Control of Cash Receipts Sergio Flores works at the drive-through window of Big & Bad Burgers. Occasionally, when a drive-through customer orders, Sergio Pills the order and pockets the customer's money. He does not ring up the order on the cash register. Identify the internal control weaknesses that exist at Big & Bad Burgers. Competent personnel, rotating duties, and mandatory vacations, Proofs and security measures. Separating operations, custody of assets and accounting Separating responsibilities for related operations