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

Read also:

• Over-the-counter supplement could prevent heart disease in type 2 diabetes patients - Medical Xpress
• These stocks are overbought after a strong May for Wall Street and could be due for a pullback - CNBC
• Heavily shorted AI stock is rapidly climbing the Fortune 500 - TheStreet
• In axing mRNA contract, Trump delivers another blow to US biosecurity, former officials say - ABC News
• How is sex in college like with roommates and big campuses?
• Trump puts U.S. Steel cart before the horse - Axios
• What would explain Trump blaming Ukraine for starting the war with Russia?
• What should I do? I'm 17 and I'm dating a 23-year-old guy.
• Do foreign workers face discrimination in Canada?
• Turning the Red Planet green? It's time to take terraforming Mars seriously, scientists say - Space
• Do you think it is likely that Maegor was presented a young dragon at some point, almost to the point of full-bonding, only to scorn it for Balerion in the end? If so, which one could it have been?
• Why do women like black men?
• Can you explain the meaning of "mint condition" in relation to antiques or collectibles?