What the numbers mean
Annual pay is hourly rate × hours per week × weeks per year. Monthly is that annual figure divided by 12, not a calendar-month average of hours. Weekly is rate × hours. If you work 40 hours for 52 weeks at $28, the annual line is $58,240 before tax.
Overtime is added only for the extra hours you type. The default extra rate is 1.5× the hourly wage, which matches common U.S. FLSA time-and-a-half, not every union contract or exempt-salary arrangement.
