Above is the first post I see where you specified the actual cost and gave the equivalent USD. For the sake of argument, assuming that the exchange rate was the same that day as it was on the day of the actual purchase, then the cost to you was $617. I don't see how that changes. The day you bought the bike you paid what you paid.

It seems to me that only the km/miles change after that, except for additional purchases. And aside from additional purchases, once you've logged a certain number of miles, the $/mi can't go up. Right?

Of course it's your show and you can post what you like. I just think it makes the figures inaccurate the way you are doing it.