Original sentence: Aliens in the Attic was commercially released on July 31, 2009 in the United States and Canada.At the end of its opening weekend, the film had grossed $8 million and opened at number five in the box office.It was distributed to 3,106 theaters, and grossed a $2.9 million on its opening day
Edited sentence: The film  grossed $8 million and opened at number five in the box office in it's opening weekend.The film was distributed to 3,106 theaters, and grossed $2.9 million on its opening day