###Human: 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?, ### Assistant: He now buys 4/2=2 coffees
The new price is 2*.5=$1 more than the old price
So he now pays 2+1=$3 per coffee
So he spends 3*2=$6
He used to spend 4*2=$8
So he saves 8-6=$2 per day 
 So the answer is :  2