https://www.extremetech.com/gaming/251038-theres-no-profit-m...
https://attackofthefanboy.com/news/microsoft-small-profit-ma...
https://www.forbes.com/sites/timworstall/2013/11/20/at-399-r...
Seems like Sony was the only one selling at a slight loss (compared to the PS3's heavy 200+ USD loss per unit) and it's most likely improved for everybody since.