[i speak in math]

I have a prospective client who wants a photoshoot of her and her fiance. She want prints and loves our prices. She is wondering about digital negatives. I have determined that I don't want to sell dng's but she want images for wedding favors such as slideshow and wine bottle label that I don't want to get into printing. So I have to provide a digital file in some form.

I am thinking of selling a cd of 5-10 low quality 72dpi file not really suitable for printing. What kind of price would this go for?

We could also sell high res jpegs (10mp @ 300 res) suitable for printing up to 20x30 or so individually. What kind of price would this go for?