How can analytical CRM help analyze the attractiveness of a residential long distance telephone services business? How would you evaluate a residential long distance business with these characteristics: the cost to acquire a customer is $300, customer churn (or attrition) is 7% monthly, and the average margin per customer is $18 per month? The service's initial sales investment is sufficient to acquire 100,000 customers and your company uses 10% per year to evaluate the attractiveness of investments.