Trying to get the right number possible.

Would Melissa prefer a fully taxable investment earning 8 percent or a tax-free investment earning 5 percent? Assume a combined marginal tax rate of 38.00 percent? The after-tax investment rate for her fully taxable investment is %. (Enter 2 decimal places. Do not put a % in your answer.) Which product should she choose to invest for higher profit? (Type A or B into the blank.) A) Fully taxable investment B) Tax-free investment