Mr. and Mrs. Braun want to accumulate $30,000 in 6 years for their son's education. They can earn 6 percent annual interest compounded monthly on an investment. For cash flow planning, the Brauns want to invest an identical amount at the beginning of each month over the next 6 years to accumulate the amount needed. What amount must the Brauns deposit into the investment each month to achieve their goal?

a)	$342.69
b)	$344.48
c)	$405.74
d)	$416.66