I am sorry to hear you are planning on eating the extra roos. There are plenty of backyard flocks that need a rooster for protection and to keep order. I hope you give it a lot of thought when you find out the sex of your hens. So,enough,I'll get off my soapbox now! Welcome to the flock and the wonderful joy of chicken farming(the folks on here call it chicken math)!
The main reasons to raise chickens are for eggs and for meat. And most people are not vegetarians.
People have traditionally kept the pullets for eggs and butchered all but one rooster for meat.
You should not be sorry to learn that someone plans to butcher a rooster. It is discussed on this website every day.