Accounting
Defaults: IQ-6, Finance-4, Mathematics (Statistics)-5, or Merchant-5.
This is the ability to keep books of account, to examine the condition of a business, etc. A successful Accounting roll (requires at least two hours of study, and possibly months to audit a large corporation) can tell you whether financial records are correct, and possibly reveal evidence of forgery, tampering, and similar criminal activity.
Modifiers: The time modifiers under Time Spent often apply; the Talents of Business Acumen and Mathematical Ability both provide a bonus.