Hi shiko0o,
about your questions:
- I want to give access to the specific sites that related to the business. and block access to other websites.
Web proxy + access lists are what you are seeking for, have a look here
http://wiki.mikrotik.com/wiki/Manual:IP/Proxy
- Wants to get reports for bandwidth usage weekly or daily .
It depends which kind of report are you seeking for, basic daily and weekly graph are configurable on the MK itself (see
http://wiki.mikrotik.com/wiki/Manual:To ... e_graphing), if you need something more then you need a tool which is able to send SNMP requests and do your magic on that device.
Just a small side note: if you use embedded graphing do not write on NAND device but keep them on RAM on on external USB drive.