Country A levies an individual income tax with the following rate structure:

Percentage Rate ___________________ Bracket

10% ...............................Income from -0- to $20,000

15 .................................Income from $20,001 to $75,000

25 .................................Income from $75,001 to $160,000

30 .................................Income in excess of $160,000

a. Mr. LV's taxable income is $69,200. Compute his tax and average tax rate. What is Mr. LV's marginal tax rate?

b. Ms. JC's taxable income is $184,400. Compute her tax and average tax rate. What is Ms. JC's marginal tax rate?