Now, just for the record, I'm not in the habit of doing math in public. In fact, I believe the last time I did substantive calculations of any sort was my freshman year of college when I barely passed trigonometry with a... (You don't really need to know that, do you? You're here for the sketches, right?)
However, seeing as how I spent what felt like the entire weekend with my head glued to my pillow, I took it upon myself to calculate the actual amount of hours I spent sleeping. According to my calculations, I slept 41.25 hours or 63% of the weekend with my longest sleeping stint taking me from 10 pm to 1:30 pm the next day.
It's a wonder I don't have bed sores.