Human: Trevor and two of his neighborhood friends go to the toy shop every year to buy toys. Trevor always spends $20 more than his friend Reed on toys, and Reed spends 2 times as much money as their friend Quinn on the toys. If Trevor spends $80 every year to buy his toys, calculate how much money in total the three spend in 4 years. Assistant: 
How much money does Reed spend every year? ** If Trevor spends $20 more than Reed every year to buy toys, Reed spends $80-$20 =$60.
How much money does Quinn spend every year? ** Since Reed uses $60 every year to buy toys, his friend Quinn uses 60/2 = $<<60/2=30>>30 every year to buy toys.
How much money do the three spend in a year together to buy toys? ** The total amount of money the three spend in a year together to buy toys is $30+$60+$80 = $<<30+60+80=170>>170.
How much money will the three use to buy toys in 4 years? ** The total amount of money the three will use to buy toys in 4 years is $170*4 = $<<170*4=680>>680.
#### 680