Cost 0 in client invoices

Problem:

user wants to set cost of jobs translated from English into Spanish at 0 on client invoices. He would like to set the cost of translation from English into Spanish at 0 on a client's pricelist.

Explanation:

it is not possible to set cost at 0 of any task on a client's pricelist.

Solution:

workaround in this situation could be changing the cost of the job in "Counts & Cost" tab of the project by clicking details next to the job.

then "Edit cost"

and changing tthe client cost