Did you ask the other color or size of a clothes ? Hahaha ! OR did you ask other options ? It means that " before we give the answer to you, we should check if it is possible " If I translate freely, it means " could you please wait a while, I am going to check it first and i will let you know if it is possible."

가능하지 저희가 한번 파악해봐야겟어요! => 가능한지 저희가 한번 파악해 봐야겠어요! = it looks like we'll have to check whether it is possible! = We're not sure but we'll take a look and see if it is possible!

It means, Let us check that we can work for you.