Without further ado, here's the formula:
WoP = (Merit + 1) / Posts x Activity
Pretty simple, really.
Here's how mine would look currently:
nutildah = (1061 + 1) / 2980 x 1162 = 414
I just add a bracket on your formula because it's confusing. Great idea though.
The Formula should be;
WoP = [(Merit + 1) / Posts] x Activity Remember MDAS?