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

Read also:

• What are the best Jewish jokes?
• Who believes that Speaker Mike Johnson will certify ‘a free and fair and legal election'? Who believes that Speaker Mike Johnson will NOT certify ‘a free and fair and legal election'? Why?
• If the Red Pill is supposed to be so bad, why are so many young men buying into it? What about Red Pill makes it appealing to them?
• Can you write a letter to your first love without mentioning his/her name?
• What are the pros and cons of banning homosexuality?
• When Chinese people see my pets, will they think of it as their food?
• What ended your relationship with your best friend?
• Scientists have discovered 'third state' between life and death - WKRC
• 'Hertz Would Never:' Man Gets Pulled Over In a Rental. Then He Reaches For the Enterprise Car’s Registration - Motor1.com
• What is the reason that Worcester, Massachusetts is not as well-known as Boston and Springfield, even though it is a large city with many neighborhoods?
• Would the word literate carry the same meaning with public (common wealth) in 1900 vs today 2020?