It's been a long time since I had a week like that. I'd have to go back into my late teens or early twenties I'd think, when I was working three jobs at the same time, one of them full time, two part time.
The full time job was tennis court maintenance dude and we worked odd shifts, either 6-3 or 2-11. We got an hour for lunch, so it worked out ok.
The part time job was bussing tables just before I started bartending, but I was doing that as much as possible. The other part time job was working at a brewery on the bottling line and it was a hideous shift - 2 am until 11 am.
There were quite a few shifts where I had some overlap and was actually being paid at two jobs at the same time. There were also two instances where I worked better than 24 hours in a 24 hour period because of that.
But 90 hours or so seems right to my faded memory.