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

Read also:

• Why is it easy to make money in the USA?
• Is there anything wrong with me because I'm still single?
• Bristol Myers Joins Race for New Class of Cancer Drugs With BioNTech Deal - Barron's
• It seems that I am cursed with bad luck. How do I break such a curse?
• I am 13 and I am planning to run away. What should I do to succeed?
• Trump administration prepares to ease big bank rules - Politico
• Is Trump the greatest spiritual leader since Jesus?
• Is there scientific evidence for reincarnation? If so, how does it work and can it be proven through regression therapy?
• Is the Democrat party connected with organized crime in America?
• Astronomers simulate a star's final moments as it's swallowed by a black hole: 'Breaks like an egg' - Space
• Team of the Matchday: Tani carries Minnesota, Joveljić sparks Sporting KC - MLSsoccer.com
• What if you were the only and last person left on Earth. How will you survive and what would you do with your life?
• Do you think that drug addiction is a symptom of larger societal ills? What is it about our culture that leaves so many feeling like they're inadequate, trying any ill to find a cure?