He has 3*4=<<3*4=12>>12 puppies

So they need 12*2=<<12*2=24>>24 shots

That means the vaccines cost 24*5=$<<24*5=120>>120

# Answer

120
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
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?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
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user
120
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?
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