Thank you for the question.
When we produced this report for parliamentarians a year ago, public estimates were not easily readily available for the F-35A variant, nor were long-term sustainment costs, so at that time we felt this would be.... Well, we were asked to produce this estimate under the Parliament of Canada Act.
Subsequently, reports have been published by the U.S. Improving Government Accountability Act, which is the audit and investigative arm of Congress, as well as by the U.S. Department of Defense CAPE unit--capability assessment and program evaluation--which has produced two estimates on the sustainment costs, and the Government Accountability Office has now produced average unit procurement costs.
Given that these are in the public domain, and they're done by respected institutions, our sense is that parliamentarians could be well served to have them as reference points for estimates that are now produced by the Department of National Defence alongside their own guidelines, which provide definitions for such things as life-cycle costs and operating and support.
We think it could be very useful for parliamentarians to have these reference points, because they are in the public domain. They are being updated on a periodic basis, and they remain estimates, but they're well explained as such.
We can provide the reports from the GAO and that could help you in your review.