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 $593,600. His additional Medicare tax is $ 12,150 X. b. George and Shirley are married and file a joint return. During the year, George earns wages of $307,400, and Shirley earns wages of $461,100. Their additional Medicare tax is $ 14,460 X. c. Simon has net investment income of $45,120 and MAGI of $225,600 and files as a single taxpayer. Simon's additional Medicare tax is $ 1,715 X