I am a novice in Google Analytics and currently managing a PPC campaign for a client and need help with goal setting in Google Analytics. The site has organic traffic of 3000 plus per month. I have created a goal funnel with the landing page given in Adwords text ads as a required step in the funnel and the last step is where the visitor enters his credit card detail to make the sale. My problem is how we differentiate which sales are coming through PPC and which via organic search as both users will reach the same page?
This image might help you understand my question.
Will appreciate any pointers in the right direction.
P.S: Administrators! I've posted this question to another forum but I didn't get any answer yet and that is why I'm posting it here. I'm not sure if it is allowed here or not. If you've any concern, feel free to delete this post.