John has 3 bedroom doors and two outside doors to replace.  The outside doors cost $20 each to replace and the bedroom doors are half that cost.  How much does he pay in total?
How much do the outside doors cost? ** The outside doors cost 2*$20=$<<2*20=40>>40
How much do the bedroom doors cost? ** Each indoor door cost $20/2=$<<20/2=10>>10
How much do the bedroom doors cost? ** So all the indoor doors cost $10*3=$<<10*3=30>>30
How much does John pay in total? ** That means the total cost is $40+$30=$<<40+30=70>>70
#### 70