Chuck breeds dogs.  He has 3 pregnant dogs.  They each give birth to 4 puppies.  Each puppy needs 2 shots and each shot costs $5.  How much did the shots cost?
How many puppies are there? ** He has 3*4=<<3*4=12>>12 puppies
How many shots do the puppies need? ** So they need 12*2=<<12*2=24>>24 shots
How much did the shots cost? ** That means the vaccines cost 24*5=$<<24*5=120>>120
#### 120