This year, State A raised revenues by increasing its general sales tax rate from 5 percent to 6 percent. Because of the increase, the volume of taxable sales declined from $800 million to $710 million. In contrast, State Z raised revenues from its 5 percent sales tax by expanding the tax base to include certain retail services. The volume of services subject to tax was $50 million. (Enter your answers in dollars not in millions of dollars.)

a. Compute the additional revenue raised by State A .

b. Compute the additional revenue raised by State Z.