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

Read also:

• Exclusive Trump interview: A big steel deal for Pennsylvania - Washington Examiner
• If there was only one man remaining on the Earth, would this be regarded as extinction?
• Nvidia Stock Gains. What’s Driving the Chip Maker. - Barron's
• ispace's Resilience spacecraft lands on the moon this week: Here's how to see the landing zone on the lunar surface - Space
• Is it right to visit any shrine or tomb in Islam?
• EleutherAI releases massive AI training dataset of licensed and open domain text - TechCrunch
• What do porn stars do when they get old?
• Do flat Earthers really exist? Why do they believe the Earth is flat?
• Wells Fargo Stock Rises as Fed Lifts Asset Cap After 7 Years - Barron's
• Transportation chief seeks to weaken fuel economy standards, calls Biden-era rule ‘illegal’ - AP News