Bulk Carnations

I need to order a number of eyelets ... somewhere around 250. I will need their week of Valentine's Day, and they can be all pink, or all red, or white, or a mixture. This is a fundraiser for the school, so not too expensive. How carnations run? Is it cheaper to buy in bulk? Is it cheaper to buy in a local store here in Texas, or order online?

I found 150 stems Costco for $ 74. Until now, thats cheaper than I saw