The total amount of money raised from friends contribution is 40/100*$10000 = $<<40/100*10000=4000>>4000

Minus his friend's contribution, the 40th president has raised $10000-$4000 = $6000

The family raised 30/100*$6000 = $<<30/100*6000=1800>>1800

If the family raised $1800, the savings the 40th president had for the campaign is $6000-$1800 = $4200

# Answer

4200
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Since the 40th president launched his reelection campaign today, he has raised $10,000 in campaign funds. His friends raised 40% of this amount and his family raised 30% of the remaining amount.  The rest of the funds are from his own savings for the election. How much did he save for the presidency?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
4200
Since the 40th president launched his reelection campaign today, he has raised $10,000 in campaign funds. His friends raised 40% of this amount and his family raised 30% of the remaining amount.  The rest of the funds are from his own savings for the election. How much did he save for the presidency?
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