This was what stacking was like 40 years ago, the walmart greeter omegastack of 1,000 ounces a year.
Now I do 25 a month at a similar level job - realistically I could get up to 37-ish if I devoted literally 100% of my disposable income towards it. It doesn't really take a lot to become a top stacker, I must be around 500 ounces right now.
But 40 years ago walmart greeters could do 1,000 ounces on a bad year.