Change size of an Adobe Illustrator book cover

Description

Hello, I need to edit the size of a book cover and I need back the AI file with the correct size and the ready to print PDF for Adobe Illustrator. You will receive an Adobe Illustrator file that has to be changed from 12480x8504 to 12527x8520.Obviously when changing the file size you need to take into account that it's a book cover and everything needs to fit properly.
15 euros budget because I know it's a quick one, 5 minutes for a designer, I did this myself in the past but I can't remember how.