gene hoffman is an employee who is paid monthly. for the month of january of the current year, he earned a total of $8,520. the fica tax for social security is 6.2% of the first $137,700 earned each calendar year, and the fica tax rate for medicare is 1.45% of all earnings for both the employee and the employer. the futa tax rate of 0.6% and the suta tax rate of 5.4% are applied to the first $7,000 of an employee's pay. the amount of federal income tax withheld from his earnings was $1,680.70. what is the total amount of taxes payable to the government for gene hoffman?