There's a lot to unpack in your question. We approached the costing with a top-down approach using analogue ships, comparing what has been spent in other countries to procure similar ships, and taking that into the Canadian context, adjusting for productivity, the size of ships, and so on.
We didn't look at the differences and capabilities, but that's probably a big factor in the cost increase, compared to what it could cost. We also did not look at procuring these ships abroad and upgrading them to Canadian specificities because procuring them abroad was not within the scope of our study, but there would be savings—