06/05/2015 17:12 EDT | Updated 06/05/2016 01:12 EDT

Key facts and figures from Michael Ferguson's audit of Senate spending

OTTAWA - The contents of auditor general Michael Ferguson's explosive forensic examination of Senate expense reports spanning the period April 2011 to March 2013, by the numbers:116: Senators who were subject to the audit7: Retired senators whose expenses are being referred to the RCMP2: Sitting senators whose expenses are being referred to the RCMP21: Additional senators whose expenses have been flagged as problematic80,000: Transactions reviewed by auditors $976,627: Total sum of questionable claims flagged by auditors$546,000: Approximate sum of questionable claims associated with just five of the senators named in the audit$176,014: The highest single total of disputed expenses claimed by one senator — retired Liberal Rod Zimmer2: Years the audit took to complete$400,000: Amount auditors say the Senate could have saved on per diems, telecommunications and holiday greeting cards with different rules in place$21 million: Reported cost of the audit