Question     Value      
What's the annual average sale volume per customer? <<< Enter number here.  
What's the average purchasing life of a customer? (number of years buying from the company) <<< Enter number here.  
Average value of a customer during his/her purchasing life.      
Number of customers that a given customer recommends or has the potential to recommend in his/her purchasing lifetime. <<< Enter number here.  
               
Residual Value of a Single Customer      
             
Assumes that customers recommend your product/service to others.

Source: Dave Harkins | http://www.davidharkins.com
 
             

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