"It's coming right up"

What does the expression "it's coming right up" mean? i've been living in US for a few months and i ordered a sandwitch at a restaurant and it was taking kinda long to get ready, so the guy told me "it's coming right up" what is that? Já ta vindo? and then when it was ready and the lady handed me the bag with the sandwitches and french fries inside, she said, "the french fries just came up" a batata frica acabou de sair? did i translate it right?