^Box Office Mojo's inflation adjusted list estimates Avatar sold 97,309,600 tickets by dividing the gross revenue by the cost of an average ticket, which was $7.50 in 2009. However, in the case of Avatar, ticket sales were a combination of the three formats of standard projection, 3D電影 and IMAX used during its theatrical run. Since box office admissions are not tracked, the total number of admissions cannot therefore be accurately determined simply by dividing the gross receipts by the average ticket price. Box Office Mojo revised its estimate by taking into account the ticket prices for all three different formats, and determined that Avatar sold 75 million tickets by April 21, 2010, with an average price of almost $10 a ticket, by which time it had grossed $745 million of its $760 million total.[7] An extra $15 million of sales would be equivalent to about 2 million more ticket sales, at the average 2D ticket price of $7.50 in 2009; using this revision, Avatar probably sold closer to 77,000,000 tickets.[8]