Lexa, a single taxpayer, worked as an employee during the first half of the year, earning $75,000 of salary. Lexa's employer withheld $4,650 of Social Security tax, $1,088 of Medicare tax, and $0 of additional Medicare tax. In the second half of the year, she was self-employed and she reported $180,000 of of net earnings from her business on her Schedule C. What amount of self-employment taxes is Lexa required to pay on her self-employment income (each component rounded to the nearest dollar)?