Means test lines 3 and 4(a,b,c)

[tallberry]

Can someone please explain to me how these lines are figured. I worked 1 month of the 6 months at my job in IN (paid payroll check with taxes deducted), spent 1 month taking classes to get my insurance license (no income), then 4 months I have been self-employed working from my home office selling insurance. For these 4 months (being self-employed) I earned a total of $4200 taxable income (straight commission, no deductions). My attorney said I need to do a P/L for my business expenses. My question is, how do I compute these numbers into the means test on lines 3 and 4(a,b,c)?