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

Read also:

• Twins reinstate Byron Buxton from concussion injured list - Sports Illustrated
• Fiery Orange Gems From The Moon Reveal Secrets of Its Violent Past - ScienceAlert
• Tensions rise as Patrick slams Abbott’s veto of THC ban: ‘Legalizes marijuana in Texas’ - KHOU
• Why do nearly all of the answers on Quora have “read more” and when I click on it, I get a virus warning every time? Has anyone else had this happen?
• Google's Demis Hassabis says AI will create new 'very valuable jobs.' Here's what he'd study as a student right now. - Business Insider
• My landlord just sold the house I’m renting from her. She included all fixtures, that I bought and installed. Does she have this right?
• From 1 to 10, how dark is the Naruto fandom? Why?
• SpaceX launches Sirius XM radio satellite to orbit, lands rocket on ship at sea (photos) - Space
• Why do most atheists in debates with theists take Bible verses out of context much of the time? Are they lying maliciously or do they not understand theology enough to understand the meaning?
• Why is Canada letting too many Indians in Canada?