http://www.gamespot.com/news/npd-black-ops-ii-is-us-top-selling-game-of-2012-6402271
Overall, total video game sales for December slid 22 percent to $3.21 billion, while the total year's haul hit $13.26 billion, down 22 percent from last year's total of $16.99 billion.
NPD Group analyst Liam Callahan cautioned that this figure only represents new physical retail sales of hardware, software, and accessories, and makes up just 50 percent of total consumer spend. [ Translation: Bricks and mortar stores, not Amazon, etc ]
"When you consider our preliminary estimate for other physical format sales in December such as used and rentals at $217 million, and our estimate for digital format sales including full game and add-on content downloads including microtransactions, subscriptions, mobile apps and the consumer spend on social network games at $765 million, we would estimate the total consumer spend in December to be over $4.1 billion"
Total software sales for December slid 27 percent to $1.58 billion, while software sales for the year suffered less, dipping 22 percent to $7.09 billion. Callahan said a major reason why retail sales for the year were down double-digits was due to a lack of new releases.
SOFTWARE
1.58billion - 217mil (used/rental) - 765mil (dlc/dd/etc) = 518mil (sales)
HARDWARE
3.2billion (total) - 1.58billion (sw) = 1.62billion (hw)