Kavitha plans to retire 20 years from now when she turns 65. She has $88,400 accumulated in RRSP and plan to deposit additional money each month to her RRSP for exactly 20 years, starting today. Twenty years from today, she plans to withdraw $15,000 to pay for a vacation and uses the remaining funds to buy an annuity that pays $6,500/month for 15 years, with the first withdrawal starting one month after she turns 65 ( i.e. 20 years and 1 month from today). She anticipates earning 5.5%, compounded monthly, the entire time.

How much must Kavitha deposit each month into her retirement plan?