I followed the ruleset and only included in-game time. I accidentally ALT+F4 during one race so I just replayed it as new and got that time. The total time is all the in-game race times added together. You can see me going through the process of calculating time at the end of the stream for proof/review. I hope this is good enough! I joined a discord call halfway thru the run and started messing about with mates, don't mind that bit lmao.

MOD EDIT: added ~59 sec for that game shutdown (based on the fact you were 59 sec into the race when the game closed)