I can confirm the answer from Victors comment (sorry, I don’t speak Spanish).
According to the rules (D.7.b) you can do:
— Pre-match evaluation on a static display: the team writes the number of cherries it intends to count during the match.
— Evaluation during a match on a dynamic display device, which must continue to show the estimated number of cherries after the end of the match.
Your question sounds like the first option. This is ok.
Nevertheless keep in mind that the preparation time is 3 minutes. (G.1)