Are actor business expenses included in gross income?

In order to qualify my child as qualifying relative, they have to have less than $4,200 in gross income.  My child is an actor.  They have slightly over $4,200 in income, but if they deduct their business expenses, they have less than $4,200, which would qualify them as my dependent.  My question is, are actor business expenses included in gross income?  And would they qualify as my dependent?  And yes, I know what the IRS publication says...I just need more clarification pertaining to my particular situation.