Scheduled payments of $$$$600$ due in six months with interest at $5\mathrm{.}2\%$ compounded quarterly and $$$$1500$ due in $18$ months with interest at $5\mathrm{.}2\%$ compounded quarterly are to be replaced by two equal payments. The first replacement payment is due today and the second payment is due in three years. Determine the size of the two replacement payments if interest is $6\mathrm{.}1\%$ compounded monthly and the focal date is today.