How much VA per seat? electrical design for a new office

I have a new project. One client is moving to a new office. In the new place, they will have 20 users, and each user will have one Dell laptop 7400 (core i7, 32gb ram), one docking station, and 2 monitors (Dell Ultrasharp or Professional 24 inch).

We need to know how much VA or watts we will need for each seat so the electricians can accommodate the electrical installations as required.

Any idea how much VA we need for a seat? 250 is enough? 300? 500?

Any advice will be appreciated!