Another off-topic digression.
Originally Posted by
Dr Jabadski
[...]
Although I’m pretty OCD/anal/compulsive my experience has been that whenever I think I’ve [calculated something or other ...]
Not that I'd wish it on you, but I'm glad it's not just me. When I was a youngster, an acquaintance boasted of never balancing a checking account: "I've got people for that." (People, in this context, was the bank.) In the decades since, I have spent countless hours balancing checkbooks, tracking spending, and doing things that other People (namely, the banks) were doing too. In all that time, I know I have gained at least $10 that the banks would have kept if I hadn't caught them. Let's see, that works out to ... something under 1¢ per hour, I think, that I have earned. At least it was tax-free.