Answer:
$160
Explanation:
her net monthly take home pay will be reduced by $200 x (1 - combined tax rate = $200 x (1 - 20%) = $200 x 0.8 = $160
If instead of contributing to her 401k account, Betty took the money home, she would have to pay $40 in taxes (both state and federal), so the net amount that she receives is reduced by the taxes that she pays.
