Both Harry and Belinda are covered by defined contribution retirement plans at work. Harry contributes $$5,400$ to his plan and his employer puts in $$2,700.$ Belinda contributes $$6,600$ and her employer puts in $$3,300.$ Assuming a $7$ percent rate of return, what would their combined retirement nest egg $($now valued at $$400,000)$ total $25$ years from now if they keep contributing?