Im asking for my friend okay she don't know how to do this. that's why im helping her out.?

my friend is 24 & she is married. but her and her husband are not together, & she wants to go to a sperm bank to try & get pergo. anyways. how does that work. what info does she need so she can get sperm from a bank? she wants to buy the sperm and do it herself. how much would that be can she get any info. on it. thanks. & don't be rude about her marriage & stuff. she just wants to be a single mom thats it.