V8, Quote -> Line -> Worksheet, logic behind Epicor's calculated fie

I've searched the groups messages and can't quite find the answer so I thought I'd post a new message.

I'm on a mission to try and find out the logic behind the calculated fields on the Worksheet tab on a Quote's line.

Primarily it's the 'Totals' box towards the bottom. How is the total 'Markup/Profits' calculated ?. And the Commission% throws me, how the heck is 1,379.64 10% of 12,416.79 ?.

Can anyone help ?.

Thanks :)