So Jay, thank you for the question. The model for the combined company today is a little bit more complex, a portion of X-spine business goes through resellers, and we count each reseller as one field sales asset, even though we have multiple employees, and a significant portion of the business for both companies goes through, what I call sales agents or distributors, these are straight commission based revenues, and then Bacterin has a direct sales force in Chicago -- in Illinois, but in the Chicago area, and in Arizona, primarily in Phoenix. So for purposes of our modeling, we have very detailed expectations for each one of those functional elements. But because it’s a larger business now, we also look at it sort of more macroscopically, and that's how I get to the 312 total field assets, and I think the right way to model it, is to look at our total revenue divided by that 312 to get to a sort of productivity per head. Its not precise, but I believe its directionally correct because of the blend of different business models. We are going to be adding five to 10 per quarter, not per year, and the idea in the ads is that is relatively inexpensive, as I mentioned with the previous caller, for us to add a sales agent or distributor, because its straight commission. There is some investment in training and samples, but in general, its straight commission, so its all variable expense. It still takes six to nine months for those sales assets to become productive, and we have to be prepared for that delay in return on that investment. So to your point about utilization, yes in some cases, for those sales assets that are exclusive to the product line, but most of these steel sales assets are either straight commission or resellers, and we only get a portion of their attention.