Jan buys 5 dozen roses.  Each rose cost $6.  Since he bought so many he only needs to pay 80%.  How much did he pay?
How many roses did Jan buy? ** He got 5*12=<<5*12=60>>60 roses
How much did the roses cost? ** So the cost was 6*60=$<<6*60=360>>360
How much did Jan pay? ** So he has to pay 360*.8=$<<360*.8=288>>288
#### 288