Cassandra Lu earns $312.80 a week. Her pay to date this year totals $10,009.60. The Social Security tax rate is 6.2% of the first $97,500 earned. The Medicare tax is 1.45% of gross pay. How much are her paycheck deductions this week for Social Security and Medicare tax? Please show work/explain how to do it. The answer is supposed to be $23.93.