Typically, the amount of electricity a computer uses is between 65 watts and 250 watts. The monitor often needs between 35 watts and 80 watts as well. Most desktop computers have a label that lists how much power they need, but this is generally the theoretical maximum and not an average representation.
West Texas Intermediate (WTI) is an extremely high quality crude oil which is greatly valued for the fact that it is of such premium quality, more and better gasoline can be refined from a single barrel than from most other types of oil available on the market.
The first thing people need to know about crude is the producers. The major crude oil producers these days are Russia, Saudi Arabia, and the United States. The top ten oil-producing countries hold a market share of ~64% of crude oil production in the world. The fall in crude oil prices impacts all the oil producers in these countries.