Erichelp, one more question

I just read the I-290B. My family includes three members and all the I-485 applications were denied. Should I filed an I-290B for each member (denial, 3 in total) or only one I-290B (to cover all of us)? $585 to file I-290B, my god, such a burden if need to file 3 I-290Bs.

Thank you in advance!