Mikrotik traffic problem

Hey, I work as an IT in a company and last week my boss told me that the dsl bill were too high.. I am using mikrotik and I want to know how can i know for every ip address how much did he download.. I tried using torch but the result isn’t clear.. so thank you for help..

To see which IP address downloaded the most data, you can use this, wich an external Netwlow analyzer tool: http://wiki.mikrotik.com/wiki/Manual:IP/Traffic_Flow