How to respond to "what are your rates"

I recently got an inquiry from a big cafe national cafe chain that also has their own designer clothing store, and I'm struggling how to go about this.

They DMed me on instagram and expressed intetest in collaborating, and shared an address to send samples of my coffee shop work n rates to.

I don't have an established rates menu, so I am wondering how to reply to this. Should I make an established rates menu? Or Do I ask about their budget first n create a custom quote? Is it appropriate to ask such a big brand what the budget is? How to properly word/go about it? Do i ask first What their photo needs are and take that info? Licensing? What to charge? Is

I am second year photography student, I started shooting food for over a year now. I'd like to work in this area later on and also commerical/product photography. My experience involves voluntarily photographing my sister's bakery and coffee shop , n a few local mom n pop bistro gigs.

Sample of my work that I am planning to share over.

https://coshiela-bote-photography.client-gallery.com/gallery/tona