He got money from 20/2=<<20/2=10>>10 households per day

So that means he got money from 10*5=<<10*5=50>>50 households

Each of those houses gave 20*2=$<<20*2=40>>40

So he raised 40*50=$<<40*50=2000>>2000

# Answer

2000
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Mark collects money for the homeless.  He visits 20 households a day for 5 days and half of those households give him a pair of 20s.  How much did he collect?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
2000
Mark collects money for the homeless.  He visits 20 households a day for 5 days and half of those households give him a pair of 20s.  How much did he collect?
train