Answer: Herbert's gross income is $100,910.
We include Herbert's salary when he was employed, unemployment compensation, dividends and winnings from lottery while calculating gross income.
We don't include his withdrawal from savings accounts, but we consider the $60 interest he earned on his savings account.
We also don't include any loans that he's taken in computing gross income.
So, Herbert's Gross Income will be:
Salary 90000
Unemployment benefits + 8800
Dividends + 550
Winnings from lottery + 1500
Interest earned on savings account + 60
Gross Income (Total) 100910