What is the best way to expense per diem?

I have a Corporate credit card attached to the Concur account. All my credit card history gets imported and itemized in the software by itself. I just have to approve it. It is very simple.

I would say that depends on the goal of the submission. If we want to expense a global per diem that will not require any specific and atomized information, probably a simple screen option where i can select several days and just 'drag and drop' or any other simple way to add the same value for all days. If we would need any comprovative of some expenses, probably a combination of a simple insert and add documents could be useful.