According to a recent statistical survey, a typical employee in the USA works for 35 hours/week.
So, if anyone works for 50 weeks a year with 2 fixed weeks of vacation (as there are 52 weeks a year), the total will be 1,750 work hours/year.
And with a $40/hour income, the total earning will be $70k/year. And if you work for 6 days a week with 7 working hours each day, your yearly income will be $84k with this hourly rate.