John used to buy 4 coffees a day for $2 each.  They raised the price by 50% so he cut the number of coffees he drinks in half.  How much money does he save per day compared to what he used to spend?
He now buys 4/2=<<4/2=2>>2 coffees
The new price is 2*.5=$<<2*.5=1>>1 more than the old price
So he now pays 2+1=$<<2+1=3>>3 per coffee
So he spends 3*2=$<<3*2=6>>6
He used to spend 4*2=$<<4*2=8>>8
So he saves 8-6=$<<8-6=2>>2 per day
#### 2