Mr.Mun an individual taxpayer whose filing status is head of household, reports total economic income of $550,000. Mun's taxable income is $400,000. What are Munss marginal and average tax rates?

A. Marginal TR = 35% B. Marginal TR = 37% C. Marginal TR = 35% D. Marginal TR = 37% E. Marginal TR = 35% Average TR = 28.34% Average TR = 28.34% Average TR = 30.27% Average TR = 30.27% Average TR = 20.25%