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

Read also:

• Sint temporibus laudantium dolore id ea aliquam.
• A 35-year-old Florida man booked more than 120 free flights by posing as a flight attendant - Fortune
• Jaire Alexander’s Contract Impeded Packers’ Trade Attempts - NFL Rumors - ProFootballRumors.com
• Westinghouse pursuing US nuclear expansion with 10 large reactors after Trump orders: report - New York Post
• Final AIDS/LifeCycle Travels Through Santa Barbara County - Noozhawk
• Panama Canal boss warns MSC ports deal threatens principle of neutrality - ft.com
• Scientists make jaw-dropping find at base of Antarctic glacier: 'May be greatly underestimated' - Yahoo
• At least 45 Palestinians killed while waiting for aid trucks in Gaza, health officials say - AP News
• United says it will slash Newark fares to win back travelers after airport chaos - NJ.com
• Powerful solar telescope unveils ultra-fine magnetic 'curtains' on the sun's surface - Space
• Top Cardiovascular Researcher Sounds Alarm Over Current Heart Health Guidelines - SciTechDaily
• Journal tells author its retracting three papers for concept that ‘violates’ law of thermodynamics - Retraction Watch
• What's a band that is really popular that you don't like? Why?