How to upload Invoice Approval Rules?

Hi gurus:

I am trying to upload the 'Invoice Approval Basic Template' with the following rules:

-- First approval (always): specific username

-- Second approval: several approval groups, depending on the distribution cost center. That's it:

----- Cost center 1000 --> approval group A

----- Cost center 2000 --> approval group B

----- Cost center 3000 --> approval group C

How can I define all these rules in the excel template?

Thanks in advance.