James binges on Cheezits and eats 3 bags that are 2 ounces each.  There are 150 calories in an ounce of Cheezits.  He then goes for a 40-minute run and burns 12 calories per minute.  How many excess calories did he eat?
He ate 2*3=<<2*3=6>>6 ounces of cheez its
That means he ate 6*150=<<6*150=900>>900 calories
He burned 40*12=<<40*12=480>>480 calories
So he ate an excess of 900-480=<<900-480=420>>420 calories
#### 420