Could I Play Playstation 3 Online for 4 Hours a Day and Surf the Internet for 1 Hour a Day ?

i have 10gb BT broadband i was just wondering if i could play 3 – 4 hours a day online playstation 3 and surf the internet for about 1 hour a day ( mostly facebook ) and not go over my 10gb monthly limit ?? i dont download music or movies and i dont download game demos. thanks

Suggestion:

So you are going to be on the computer for 5 hours a day. Bit sad isn't it?