Call plans will have associated call connection fees and call rates.
In order to find out what these are, you will need to go to the "Rates" (ref. 1.) tab and look at the "Call Plans" (ref. 2.) section.
Search and select the "Call Plan" (ref. 3.) required and click on the "Assigned Cards" (ref. 4.) tab on the right. Take note of the "Rate Cards" (ref. 5.) assigned to this plan and then click on the "Rates" section on the left.
Search for the "Rate Card" (ref. 3.) and the results should show you the sell rate and connection charges for each prefix assigned to the rate card.