Identify the type of audit evidence being used in each situation described below:

$($a$)$

The auditor tests cash remittance advices to ensure that allowances and discounts are appropriate and that receipts are posted to the correct customer accounts in the right amounts. In addition, the auditor reviews the documents supporting unusual discounts and allowances. Which of the following types of audit evidence is used in this situation?

$$ Documentary, inspection, sufficient $$ Electronic, inspection, confirmation $$ Computational, documentary, electronic $$ Reliable,computational, external $$ Computational, documentary $$ Physical, confirmation, computational