Passage: Inception's première was held in London on July 8, 2010; it was released in both conventional and IMAX theaters beginning on July 16, 2010. Inception grossed over US$828 million worldwide, becoming the fourth highest-grossing film of 2010. The home video market also had strong results, with US$68 million in DVD and Blu-ray sales. Inception opened to acclaim from critics, who praised its screenplay, visual effects, score, and ensemble cast. It won four Academy Awards for Best Cinematography, Best Sound Editing, Best Sound Mixing, and Best Visual Effects, and was nominated for four more: Best Picture, Best Original Screenplay, Best Art Direction, and Best Original Score.

Question: How much was made through DVD and Blu-ray sales?
US$68 million