Do you know how many eggs your household currently uses per day or per week?
If you do not already have experience with chickens, it is usually best to start fairly small, rather than jumping into a big project right at first. I would think somewhere between 6 and 25 birds is a good starting point.
It's easier to add more the next year, after you know better how to do it.
If those are the kinds of chickens you intend to get, given the various egg numbers you have mentioned, I suggest you order 8 pullets of each of those 3 kinds. That makes 24 chicks, which is a number that ships nicely in one box (they may stick in a few extras, so you're likely to receive 26 or 27 chicks.) It also makes a fairly nice size of flock. Assuming most of them grow up safely, they will probably give you between 12 and 24 eggs per day, depending on the season.
Since you mention McMurray-- during checkout they will ask if you want a free mystery chick. Those chicks are almost always males. So don't get that chick unless you have a plan for him (either keeping him as a rooster or butchering him.)