If we assume that the dealers did a 24 hour shift it means:

• 3 Days á 24 Hours = 72 hours
• 8653 Cars / 72 Hours = 120 cars per hour
• 120 / 60 = 2 cars per minute...
• So one car sold every 30 seconds.

If we assume normal 8 hours per day:

• 3 days á 8 Hours = 24 hours
• 8653 / 24 = 360 cars per hour
• 360 / 60 = 6 cars per minute.
• So one car sold every 10 seconds.

Without reading through the article: No, I'm pretty sure they didn't sell that many cars. --