Net Pay question

Maxwell McFarland's weekly gross earnings for the week ending December 18 were $2,830, and his federal income tax withholding was $509.4. Prior to this week, McFarland had earned $98,400 for the year. Assuming the social security rate is 6% on the first $100,000 of annual earnings and Medicare is 1.5% of all earnings, what is McFarland's net pay? If required, round your answer to two decimal places