I do not believe that the one I work at has this option, unless you do it through the website. Though that's pretty limited too
No their stock is pre made
It depends on your location. Some locations have this option, some do not. It would be something to give Costco a call and ask.
I would check out Costco.com for large rose orders, what they have in store is what they have
Costco.com has pre order options for something like that.
I don't believe so. They are first come, first served
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