reimbursement dilemma

Mike is a new employee in the accounts payable department in a small software sales company. He recently graduated from college and this is his first professional job. Brenda is a long time, experienced sales manager with the company who travels extensively. She approached Mike for help in submitting several expense reports for business related travel. Mike has assisted Brenda in the past, to include making travel arrangements for her. In preparing the expense reports, Mike noticed that a number of the receipts are for personal items, which are not authorized for reimbursement; including a massage at a health club and a manicure. When he approached Brenda about this, she angrily told him to “just submit the report like you are told.” Mike and his wife recently had a new baby and Mike is the sole source of income for his family.

What options are available to Mike in handling this dilemma?