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That sounds way too complicated. If only there was a way to search for a tool to do this calculating for you.

For the deeply lazy or those without number sense and no desire to improve, go here: 
http://www.gregledet.net/ppfcm.html

Why on earth would you say something like that?

In theory, we are dealing with our friends here on DFS. In theory, you are honest with friends and keep prices fair plus simple.
I understand for a high volume seller, and extra dollar or two can be big bucks in the long run.

I buy from friends or look on other sites.

if a bst thread is breaking the rules, just report the post and it'll be dealt with accordingly.

if a bst thread is breaking the rules, just report the post and it'll be dealt with accordingly.