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

Read also:

• Why do many Hong Kong Chinese look different from the Han Chinese in mainland China?
• Russell's F1 Canadian GP win in doubt after Red Bull protest - Autosport
• Eating More of These Foods May Lower Your Cancer Risk by 8%, New Study Suggests - EatingWell
• Asus ROG Xbox Ally X pre-order date and price may have been revealed - The Shortcut | Matt Swider
• Sean “Diddy” Combs’ Faces New Accuser “Jane” Wednesday; Trial Dominated Today By $100K Payment For “Only Copy” Of 2016 LA Hotel Footage Of Cassie Ventura Beating - Deadline
• Which AI tool is capable of writing code and creating software from simple instructions?
• Why is the government destroying the homeless instead of helping them?
• 2 North Texas malls rank among the best malls in the U.S. that 'elevate the shopping experience' - WFAA
• Judge orders Trump administration to provide due process to some migrants deported to El Salvador - NBC News
• Why do unattractive men assume that a pretty woman like me want them?