Heidi Brodette operates a virtual software store. Last year she paid $32 comma 000 for software sold, had operating expenses of $9 comma 280, gross sales of $80 comma 000, returns of $640, and paid $4800 in taxes. Determine her gross profit, her net income before taxes, and her net income after taxes. Heidi's gross profit was $ nothing. Her net income before taxes was $ nothing. Her net income after taxes was $ nothing.