Courtesy of Box Office Mojo:
6 – Barnyard with $7,581,622, averaging $2,349 over 3,227 theaters ($46,088,273 total; 3rd week)
14 – Monster House with $1,970,819, averaging $1,178 over 1,673 theaters ($67,372,407 total; 5th week)
17 – The Ant Bully with $1,041,357, averaging $1,225 over 850 theaters ($24,616,815 total; 4th week)
24 – Cars with $438,906, averaging $1,236 over 355 theaters ($239,618,177 total; 11th week)
27 – Over the Hedge with $267,095, averaging $957 over 279 theaters ($154,482,036 total; 14th week)
44 – A Scanner Darkly with $96,158, averaging $769 over 125 theaters ($5,159,136 total; 7th week)
45 – Garfield: A Tail of Two Kitties with $84,615, averaging $519 over 163 theaters ($28,189,436 total; 10th week)
67 – Ice Age: The Meltdown with $17,043, averaging $415 over 41 theaters ($195,297,762 total; 21st week)