It is general principle which states that 80 % of the profit is generated from the 20% of the customers. And 30 % of the profit is spent in acquiring the new one. Learning which 20 percent of their customer prospects is most likely to become buyers. I believe that there is no certainty that the amount or profit that we spent in acquiring new customers will not be of help. If we spent that same in retaining the existing consumers would do better.