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

Read also:

• Does Taylor Swift actually play the guitar, or is it a prop?
• Your Camper’s Water Tank Could Be Carrying Serious Diseases, Here’s How To Fix It - The Autopian
• Trump Media Raises $2.32B—Bitcoin Treasury and Big Moves Ahead - Bitcoin.com News
• Gina Ortiz Jones, a Progressive, Is Elected San Antonio’s Mayor - The New York Times
• ESA’s Bug-Eyed Robot Telescope Just Spotted Its First Asteroid — And It Could Save the Planet - The Daily Galaxy
• Star Trek: Strange New Worlds is getting a fifth and final season - The Verge
• Joe Milton gives 4 reasons why trade to Cowboys was a ‘blessing,’ shades Patriots’ offense - Boston.com
• What made you recently say to yourself, “Wait. Really?”
• Measles 'exposure event' confirmed in Great Falls - KRTV
• Lowering Blood Pressure May Cut Dementia Risk by Up to 15% - Neuroscience News
• Astronomers discover 15 new giant radio galaxies — the largest single objects in the universe - Space
• The FC Bayern squad for the Club World Cup - FC Bayern Munich
• F1's Canadian GP will clash with the Indy 500 every five years - Motorsport.com
• What are James Potter's flaws?
• What is the estimated number of people with an extra X chromosome?