Automatically filling out data when assigning activity

When assigning an activity to a resource, man can use a drop-down menu to choose a resource. Also all other info has to be filled out manually. However, when a resource is chosen, the function and costs of this resource are known. (and probably most other fields too)

Still, these fields have to be filled out manually.

Suggestion:
I would fill out the other known information in the fields automatically when choosing a resource.
This reduces the time needed for assigning a resource, and is less vulnerable for mistakes.

I see my mistake. I did not fill out the function for the resource. Now it is behaving like I expected.