Exercise 12-25 (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 $545,200. His additional Medicare tax is $ b. George and Shirley are married and file a joint return. During the year, George earns wages of $183,400, and Shirley earns wages of $275,100. Their additional Medicare tax is C. Simon has net investment income of $47,080 and MAGI of $235,400 and files as a single taxpayer. Simon's additional Medicare tax is $X. Feedback Check My Work Two additional Medicare taxes are assessed on high-income individuals - a tax on wages and a tax on unearned income