How much time do you spend at PC?

I have never added up the hours I spend on my pc. I switch it on in the mornings and try to answer as many emails as possible. Then I have breakfast and come back to my pc while I am havin my coffee. I usually do my chores and whatever else needs to be done and I take a few breakds while sitting at my pc. I also spend a couple of hours here in the evenings. I suppose it would amount to about four hours in total.