Exercise 13-23 (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 $573,800. His additional Medicare tax is $ 3,364 V. b. George and Shirley are married and file a joint return. During the year, George earns wages of $279,500, and Shirley earns wages of $ 419,250. Their additional Medicare tax is $ 4,039 c. Simon has net investment income of $54,360 and MAGI of $271,800 and files as a single taxpayer. Simon's additional Medicare tax is $ 1,135 X. Feedback Check My Work The Affordable Care Act of 2010 and the Health Care Reconciliation Act of 2010 include two provisions that result in increased Medicare taxes for high-income individuals