Aing Limited has recently developed an integrated financial reporting management system. During the tests, the following data entry and processing errors were detected in the system: Input errors: 1. An existing product number was identified on the online order form. 2. Inventory entries were booked to another inventory account. 3. In the pay system, all employees in a department have been processed at the Rs. 100 rate despite of Rs. 80. 4. Wages for a few employees were processed twice. Required: Identify and briefly describe an enforcement action for each of the above types of errors that would have been effective in preventing or detecting the error.