Compute the additional Medicare tax for the following taxpayers. If required, round your answers to the nearest dollar.

a. Mario, who is single, earns wages of $444,000. His additional Medicare tax is $f__________.

b. George and Shirley are married and file a joint return. During the year, George earns wages of $211,300, and Shirley earns wages of $316,950. Their additional Medicare tax is $___________.

c. Simon has net investment income of $48,200 and MAGI of $241,000 and files as a single taxpayer. Simon's additional Medicare tax is $______________