Answer:
The auditor is entitled to collect the audit fee and is not liable for $90 000.
Step-by-step explanation:
Ace & King did their job in a competent way, the fact that the company's controller was doing something illegal is not their responsibility. External auditors work with the information that is given to them and their job is limited to analyzing them and making their conclusions about them.
In this case, the controller was the person responsible for giving the information to the auditing company, so he had the chance to direct their conclusions. An external auditor is not responsible for what happens inside a firm, and if someone steals money or assets, he/she is responsible for it.