Now, hold still! Stop squirming! I'm trying to attach the guinea pig sized HRM strap! Can your paws reach the handlebars?

I'd say your "deskjob day" maintenance is probably 1400-1500. I ran your stats through three different cycling calorie estimators. One said 4000, another said 4800, another said 5200. Probably safe to say you burned around 4500. So your day would stack up like this:

3574 consumed
-4500 burned on bike
-1500 just breathing, digestion requirements, etc
------------------------------------
-2426 deficit

Your onbike rate of eating was perfect. Especially considering that these various articles suggest you can't absorb much more than 200 kCal per hour. And you were eating 200 calories per hour of ride time. Of course you're burning much more than 200 cal/hr, so you have to make it up before and after the ride. BTW, you didn't mention the day before. I always make sure to eat an extra ~1500 calories than I need the day before a big long ride.

Teehee tlkiwi! I couldn't tell if you were sassing me or not.