Sally Sims just turned 20 and received a gift of $50,000 from her rich aunt. Sally would like to retire on her 55th birthday and thinks she'll need to have about $2,000,000 saved by that time to maintain her lavish lifestyle. She plans to make a deposit at the end of each month until she is 50 into an account that she'll open with her aunt's gift. After age 50, she plans to stop making deposits and let the money grow until it reaches $2,000,000 when she turns 55. Assume she can earn 7% compounded semi-annually. How much will Sally have to deposit into her account each month to achieve her objective?