source: https://www.uscis.gov/i-864
Example of How to Use Assets: If you are petitioning for a parent and the poverty line for your household size is
$22,062 and your current income is $18,062, the difference between your current income and the poverty line is $4,000.
In order for assets to help you qualify, the combination of your assets, plus the assets of any household member who is
signing Form I-864A, plus any available assets of the sponsored immigrant, would have to equal five times this difference
(5 x $4,000). In this case, you would meet the income requirements if the net value of the assets equaled at least $20,000.