This week David Sacks of PayPal, Yammer and Craft Ventures fame published Simple Math to Set Up a Sales Team. I was delighted to see this post, as I've been meaning to write something similar for ages. If you lead a sales team, or are thinking of building one, I suggest you digest this thoroughly and "check your math." Note that while this was written for SaaS business models, the same ratios can apply to other models, so long as you use gross margin in place of revenue for your calculations (e.g., retail revenue is not the same as software revenue).