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

Read also:

• Why do some people dislike rap and hip hop music despite there being poor quality music in every genre?
• NASA discovers that Earth's twin planet, Venus, is not geologically dead - Earth.com
• Is there a possibility that we are living in a simulation and that there is a concept of rebirth?
• Vera Rubin quarter coin released by US Mint - BBC Sky at Night Magazine
• Wild card Boisson stuns Pegula - Roland Garros
• Why does my dog keep licking at her privates now? She is 7 years old and has barely started licking there. The vet said she’s fine but she keeps doing that.
• Chevy Teases a New Corvette 'X' to Debut Next Week - Road & Track
• Is it possible for sociopaths to feel genuine remorse for their actions or thoughts towards others, even if they are skilled at hiding it from others?
• Live Updates: FSU 5, Miss. St. 2 -- FINAL - 247Sports
• Texas governor vetoes hemp ban bill - Politico
• Ex-NASCAR driver Danica Patrick weighs in on Riley Gaines and Simone Biles' social media feud over trans athletes - New York Post
• What is your craziest/worst Halloween story?