Ada is planning to retire in 15 years and would like to receive $2500 from her RRSP at the end of every month for 20 years during her retirement. At the end of this 20-year period, she would like to have $20,000 in the RRSP after receiving her last payment. If she receives the first periodic payment one month after she retires, how much would she have to invest in an RRSP that has an interest rate of 4.5% compounded semi-annually?

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