Exercise 12-19 (Algorithmic) (LO. 7) 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 $560,600. His additional Medicare tax is $ b. George and Shirley are married and file a joint return. During the year, George earns wages of $186,500, and Shirley earns wages of $279,750. Their additional Medicare tax is $ C. Simon has net investment income of $58,560 and MAGI of $292,800 and files as a single taxpayer. Simon's additional Medicare tax is $