What is the sum of X+XX+XXX+XXXX?

Read also:

• When did you realize that your childhood was not normal?
• Americans Are Growing Less Interested in Buying Electric Vehicles, Study Says - Road & Track
• Scientists discover a 33-foot Jurassic giant, twice as big as its cousin - Earth.com
• UNC Pours It On Arizona in Opener, Piles Up Super Regional Record - 247Sports
• Person With Deadly Virus Visited Popular Hudson Valley Restaurant - Hudson Valley Post
• What are the pros and cons of a prospective bride/groom not having any siblings?
• How conservative the Japanese people really is? And the government?
• Belmont Stakes: Hill Road faces challenges beyond tough field - Horse Racing Nation
• Is BPD real or just an excuse?
• Two Ocean Bands Are Warming Faster Than Ever — What This Means for Our Climate - The Daily Galaxy
• Over 60? Forget walking and swimming — this simple exercise builds strength and balance - Tom's Guide