John buys dinner plates and silverware.  The silverware cost $20.  The dinner plates cost 50% as much as the silverware.  How much did he pay for everything? Let's think step by step and output the final answer after "####".
user
The dinner plates cost 20*.5=$<<20*.5=10>>10
So he paid 10+20=$<<10+20=30>>30
#### 30
John buys dinner plates and silverware.  The silverware cost $20.  The dinner plates cost 50% as much as the silverware.  How much did he pay for everything?
train