Company A sells accounting software and makes $10 000 on each product it sells. It sends an email to its customer base, users who have bought a previous version of the software and might be interested in upgrading. The campaign has an overall cost of $100 000. Of the 5 000 users who receive the email, 10% decide to buy. That means it cost $200 to acquire each of the 500 customers. The company has made ______________ million.