I think this is mostly a US thing. Why use yearly salary? You’re not paid once a year, are you? Most likely once a month. Referencing monthly salary makes much more sense.
“I’m making 50k”. Great, now I have to guess - dollars? Monthly? Yearly? If yearly then what’s the monthly paycheck? Net? Gross?
The 2080 assumes you’re salaried at the normal 40 hours per week rate. Salaried employees don’t get a variable amount each week if you work more or less hours than normal.
That’s not necessarily true. As the comment above mentioned, it’s uncommon, but non-exempt salaried positions do exist where, yes, you would be paid more if working overtime even as a salaried position.
Right, so the general rule stands.