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

Read also:

• Can you share any "backstage pass" experiences you have had at concerts?
• Oil rallies as Russia-Ukraine tensions offset OPEC+ output hike - Investing.com
• Why are most people broke?
• China Set for Critical Orbital Refueling Test With 2 U.S. Satellites Watching Closely - Gizmodo
• Video: Street Fighter 6 Showcases Four New Character Outfits - Nintendo Life
• iFixit is retroactively giving the Nintendo Switch a 4/10 on repairability - The Verge
• AMD has limited Radeon RX 9060 XT 8GB sampling based on ‘regional market demand’ - VideoCardz.com
• The odd effects a year in space has on the bodies of astronauts - supercarblondie.com
• What was Meghan Markle's reaction to the meeting between Prince William and Taylor Swift?
• I've written three books, but I haven't been able to promote them yet. What should I do?