Sponsoring husband to USA - I-864

QUESTION:  I am filling for my husband .MY I-130 application was Approved.my question
 is on my I-1864 affidavit of support
what is my sponsor household size? I'm only filling for my husband and in my last year 
tax return I claim my two nieces, ..how much should my income salary to bring my husband ? 
I relly need help .I hope you could understand my question.thank so much

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david ingram replies:

As described, you would need  $25,812 for a family of four to match your Income Tax returns.  This amount can be found in form I-864P

If it was just you and your husband you would only need $17.112.  However, to explain the two nieces the year befoe and now there is just going to be two of you, you will need a good explanation about who will be responsible for the nieces in the future.

You will want to read this for the poverty guidelines
Form I-864-P - http://www.uscis.gov/files/form/I-864P.pdf - extra instructions at
http://www.uscis.gov/portal/site/uscis/menuitem.5af9bb95919f35e66f614176543f6d1a/?