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

Read also:

• Eagles star Saquon Barkley stunningly hints he could retire ‘out of nowhere’ - New York Post
• FX’s ‘Alien: Earth’ Official Trailer Reveals a Predatory Twist - The Hollywood Reporter
• Those Ice Baths May Not Be 'a Great Idea' - Newser
• These are the best new MacBook deals in June: options starting at $649 - 9to5Mac
• Why is Reddit blocked by the Indonesian government?
• Scientists Unveil a Method to Give Every Human the Ability to See in the Dark - The Daily Galaxy
• Did the Sumerians, Babylonians and, other Mesopotamians create more, influence more and, were more advanced than Egypt?
• Seahawks coach sounds off on ‘crazy’ Sam Darnold QB controversy after $100 million star’s rough practice - New York Post
• Vanderbilt Baseball Eliminated by Wright State, 1st No. 1 Seed to Miss Regional Final - Bleacher Report
• Third case of bird flu detected at commercial farm in Maricopa County - ABC15 Arizona