here are some items that belong on doc company's income statement. advertising expense $43,479 rent revenue $4,479 telephone expense $13,414 postage expenses $19,840 dividend revenue $9,827 depreciation expense $31,007 cost of goods sold $1,589,787 salaries expense $19,840 travel expenses $6,262 sales revenue $5,000,000 interest expense $3,740 what is the net amount of their non-operating expenses and revenues?