The ping pong balls cost 10000*.10=$<<10000*.10=1000>>1000

So the discount is 1000*.30=$<<1000*.30=300>>300

So he pays 1000-300=$<<1000-300=700>>700.

# Answer

700
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Ping pong balls sell for $.10 each.  Johnny buys 10000 for a prank.  He gets a 30% discount for buying in such large bulk.  How much does he pay?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
700
Ping pong balls sell for $.10 each.  Johnny buys 10000 for a prank.  He gets a 30% discount for buying in such large bulk.  How much does he pay?
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