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

Read also:

• What are some tips for balancing chores, work, and family life as an adult with children?
• Amazon reveals best books of the year so far: Suzanne Collins, S. A. Cosby make the list - USA Today
• What caused the decline of the Soprano crew?
• What is unattractive about a nice guy? Why do some women don’t choose nice guys?
• Discovery of a Lifetime: Student Discovers Ancient “Living Fossil” Underneath Rock - SciTechDaily
• Carlos Alcaraz roars all the way back to win the French Open again - The Washington Post
• Why would an older small breed dog become obsessive about hygiene?
• Rare ‘Einstein zig-zag’ sheds light on universe’s hidden forces - The Brighter Side of News
• Today's Best Deals: Enjoy Big Savings on Switch 2 Accessories During Launch Day — Plus Cheap Handheld Gaming PCs, Father's Day Gifts & More - IGN
• Here's How Much Traders Expect Apple Stock to Move After WWDC - Investopedia