Howif you work 7 in a half hours and make 8.50 an hour what is your annual per year?

The quick way to determine roughly yearly income based on an hourly salary is to multiply it by 2, and think of it as thousands. For $7.80 per hour that would be around $15,600.

This is based on an assumption of 50 working weeks in a year, 40 hours per week. For a full 52 week, all holidays and vacations paid position, the difference is still less than 5%, so multiplying by 2 gives a good first approximation.