human
John buys 20 bars of soap each weighing 1.5 pounds for $.5 per pound. How much money did he spend on soap?
assistant
How many pounds of soap did John buy? ** He bought 20*1.5=<<20*1.5=30>>30 pounds of soap
How much did John spend on soap? ** That cost 30*.5=$<<30*.5=15>>15
#### 15