This is the total house-hold take home pay, after taxes are withheld. It should include all income sources (Employment, Alimony, Trust Funds, etc)
Describe the nature of your irregular income. Is there a minimum amount that you would be comfortable "counting on" despite the fluctuations? (ie if your income is $2,000 - $3,000 per month, but rarely goes below $2,000, you could enter $2,000)
Describe the tools and process you use for your monthly budget.
Not including your emergency fund.