An employee earns gross pay of $720 during the current pay period. Taxes associated with these earnings include federal withholding tax of $45, state withholding tax of $18, social security tax of $44.64, Medicare tax of $10.44 FUTA tax of $4.32, and SUTA tax of $38.88. What is this employee's net pay for the current pay period?

a). $558.72

b). $601.92

c). $615.60

d). $720.00