Answer:
$3,204.6
Explanation:
$ 4,200 represents 100% of his salary
x amount of $ represents 16.05 % in federal withholding
after you line up $ with $ and % with % think cross multiplication
x = 4,200* 16.05/ 100 = $674.1 is the amount in federal withholding
Net pay = 4,200 -674.1 -321.30 = $3,204.6