John's annual gross income is
$87,600, but FICA is deducted
from his paycheck, and 23% of
his salary is withheld for income
taxes (federal, state, and local
combined), as well. If his
employer pays 60% of the cost of
a $2500-per-year health
insurance plan, and if health
insurance is John's only optional
deduction, what is his monthly
take-home pay?