Conversation so far:
when did the iphone 5 first come out
The iPhone 5 was released on September 21, 2012.
How much did the iPhone 5 cost at release?
iPhone 5 will cost $199 for a 16GB version of the phone, $299 for a 32GB version and $399 for a 64GB version.
What was the release date of the iPhone 6?
The iPhone 6 and iPhone 6 Plus released on September 19, 2014.
What was the price for the iPhone 6?
The iPhone 6 starts at $199 and the iPhone 6 Plus starts at $299.

Question: how were the sales of the device
Self-contained rewrite: What were the sales figures for the iPhone 6?