Mr. Chair, again I'll start on a response, but I note that Ted, based on our conversation yesterday, will be able to elaborate.
There are two issues that I want to clarify before turning it over. One is whether we can account for the additional money we got and how we're spending it.
Absolutely we can. It's clear how much we've spent and where we've spent it, whether it's on hiring new auditors, investing in IT or investing in different analytics to give us a better risk-based assessment. That's one part. Yes, we can identify where we're spending the money.
The second part, which I think is what you're raising, is what good it is doing: how much extra money it's bringing in and what the incremental impact of having spent that additional dollar is, wherever we have spent it, upon the revenue we brought in.
Again, we have a methodology that I think does a good job. We have committed to looking at whether we could improve that methodology, but I'll let Ted explain a little bit about how we calculate that incremental benefit.