What would be your future account value (after-tax and after inflation) if you invested $500 each month into a growth mutual fund for 40 years? Assume an average annual rate of return of 7.5 percent. Assume a combined federal and state income tax rate of 28% and an average annual inflation rate of 2.7 percent. O $450,374.33 O $424,352.37 O $387,475.91 O $344,387.30