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

Read also:

• What is the difference between the terms "Millennials" and "kids"?
• Flight deal experts spot a surprise upcharge: Flying solo - The Washington Post
• Nelly Korda coaxes in final birdie, overcomes front-nine 40 to stay in U.S. Women's Open mix - NBC Sports
• Scientists discover 34 million year old hidden river world buried under 2 km of Antarctic ice - Times of India
• California schools are very liberal. Do you think California schools are teaching students to hate Republican views (views on: God, guns, prayer, secure borders, etc.)?
• Nephrologist shares signs to know if your kidneys are not healthy: 'Weight loss and poor appetite to swelling in…' - Hindustan Times
• What is the reason for The Acolyte (2024 series) having poor reception among Star Wars fans?
• The Sin of Inaction: How Yates took the Giro, and UAE let it go - Escape Collective
• UNC Roughs Up Oklahoma, Seizes Control of NCAA Regional - 247Sports
• Why do flat earthers exist?
• Magnetic fields appear to be as old as the universe itself. What created them? - Space