Volker is an employee of Equus Corporation. He also has his own business working as a ferrier. For 2019, Volker's wages from Equus were $148,000. His self-employment income was $36,500.

If required, round any computations to two decimal places and use in subsequent computations. Round final answers to the nearest dollar.

If an amount is zero, enter "0".

a. Compute the total payroll, self-employment, and additional Medicare taxes for Volker for 2019.

b. Assume the same facts except that Volker's 2019 self-employment activities resulted in a loss of $15,000. Compute the payroll, self-employment, and additional Medicare taxes for Volker for 2019.

c. Compute Volker's NIIT for 2019 using wages of $148,000, self-employment income of $36,500, and NII of $10,000.