Tiffany Baldwin's pre-tax deductions are the parts of her salary that
she does not have to pay income tax on. Those include the parts of her
salary that already go to taxes, which are her federal income tax, state
income tax, and her FICA (Social Security and Medicare) taxes. Those
taxes are $25 + $11 + ($800 x .0765) = $97.20. Baldwin's other pre-tax
deduction is her contribution to her 401K retirement account, which is
$800 x .02 = $16. So, her total pre-tax deductions for a week are $97.20
+ $16 = $113.20. The amount she has taken out for her gym membership is
"post-tax", meaning she still has to pay income tax on that $20 every
week, so this is not included.