If I get paid 7.50 an hour and have done 19.82 hours. How much would I get paid?

19.82 hours ($7.50/hour) the hours cancel leaving $$
= $148.65

Now come the deductions, most prominent are estimated taxes. These depend on the paperwork you filled out. Figure they will take about 20%, so you're left with about 80%.

$148.65 * 80% = $118.92

So you might get $120 or so, but it could be anywhere from $90 up

As for how much you will get paid...NO ONE KNOWS. I'll assume you filled out a W4 for your taxes. The number of deductions you listed will affect your taxes collected (paid in) and thus your net pay.

Windows has a FREE calculator. I'll get you started: 7.50 X 19.82 = ?

It's bi-weekly, and you'll make $148.65 BEFORE taxes. So you may end up around $120 after taxes or somewhere around there.