John's new computer cost $1500.  He needs to get a monitor and other peripherals that cost 1/5 that much.  He also wants to upgrade the $300 video card in the base computer with one that costs twice as much.  How much did he spend?
The peripherals cost 1500/5=$<<1500/5=300>>300
The video card cost 300*2=$<<300*2=600>>600
So it cost 600-300=$<<600-300=300>>300 more
That means the total cost was 1500+300+300=$<<1500+300+300=2100>>2100
#### 2100