A validation check used to determine if a quantity ordered field contains only numbers is an example of a(n)
Input control.
Audit trail control.
Processing control.
None of the above
Which of the following controls would assist in detecting an error when the data input clerk records a sales invoice as $12.99 when the actual amount is $122.99?
Batch control totals.
Echo check.
Limit check.
None of the above