It's simple.  You're entering 'equivalence points'.  In the top section, if an attribute has a '1' and another has a '2', it means the item's score will be 1*(amount of first attribute) + 2*(amount of second attribute).  It's used to make calculations to compare two items with different attributes to see which is better.

For example, for shamans, 1 strength gives you 2 attack power.  So, the attributes next to 'strength' and 'attack power' need to be in a 2:1 ratio.  (In other words, having X strength is just as good as having 2X attack power, for any value of X.)

There's formulas online that'll give you equivalence points; that's basically what you're entering here.  Look at my first 'shaman' post to see an example.  (This is taken from the Elitist Jerks forums for enhancement shamans, based off of simulations and lots of real-world testing.)