Donohue Professional Services has three employees-a consultant, a computer programmer, and an administrator. The following payroll information is available for each employee: Consultant Computer Programmer Administrator Regular earnings rate $2,910 per week $30 per hour $40 per hour Overtime earnings rate Not applicable 1.5 times hourly rate 2 times hourly rate Number of withholding allowances 3 2 1 For the current pay period, the computer programmer worked 60 hours and the administrator worked 50 hours. The federal income tax withheld for all three employees, who are single, can be determined by adding $340.44 to 28% of the difference between the employee's amount subject to withholding and $1,687.00. Assume further that the social security tax rate was 6%, the Medicare tax rate was 1.5%, and one withholding allowance is $70