Electronics Service Co. pays salaries monthly on the last day of the month. The following information is available from Electronics for the month ended December 31, Year 1:

Administrative salaries ...................$96,000
Sales salaries .....................................57,000
Office salaries ....................................38,000

Assume the Social Security tax rate is 6 percent on the first $110,000 of salaries. Duke reached the $110,000 amount in September. His salary in December amounted to $11,500 and is included in the $96,000. No one else will reach the $110,000 amount for the year. None of the employee salaries are subject to unemployment tax in December. Other amounts withheld from salaries in December were as follows:

Federal income tax ..........................$21,500
State income tax ................................11,200
Employee savings plan ........................4,000

Required
a. Determine the net pay for employee salary expenses on December 31, Year 1.
b. Determine the amount of payroll tax expense for Electronics Service Co. for December Year 1.