Force in weld critical element clarification

I'm trying to verify the total force (Fn) reported by PROFIS for the critical section of the weld. Using the weld curve shown in the web application I am unable to verify the area used by PROFIS. Using the Leg size of weld (Ls) and the Length of the weld critical element (Lc) does not result in the same total force (Fn) reported by PROFIS. I attached the report output from the example I'm trying to verify. Can you please clarify how the area of the weld is being determined?