Price for updating video ad every day for 2 weeks

I created a 30sec whatsapp ad for an organisation.
the video says the number of ppl who have signed up already.
For the next 2 weeks they want me to update the number every day.
I will have to give them a new video every day with updated number.
How much do you think I should charge for this?

it won’t take me long to change the number, it’s more the bother of doing it every day again, exporting etc…

minimum $25 each time

makes sense thanks.