One way to work around that: get twice as many "females" as you want, then plan to butcher or rehome the extras. Some people have good results selling extra pullets to people that don't want to raise them from chicks.more than my fill of unintended cockerels, as well as ones that I could pick up instead of worrying about shipping - losses, minimum numbers (I can only have 3 more birds), and shipping stress.
That method does require either butchering or rehoming (which you would rather avoid), but it does make it more predictable, and increases the chance of having the right number of healthy pullets to keep.
When you want fried chicken, males and females and crossbeaks and bullies and escape artists all taste equally good!
(Of course there are other ways to do things. I'm just mentioning this one because it works for some people and hasn't yet been mentioned in this thread.)