Mike gets paid 100 dollars a week.  He decides to spend half of that at an arcade.  He spends 10 dollars at the arcade on food and uses the rest on arcade tokens. He can play for 1 hour for $8. How many minutes can he play?
He spent 100*.5=$<<100*.5=50>>50 at the arcade.
He uses 50-10=$<<50-10=40>>40 on tokens
He can play 40/8=<<40/8=5>>5 hours
There are 60 minutes in an hour so he can play 5*60=<<5*60=300>>300 minutes
#### 300