popup window, , to calculate the corporation's tax liability. What are the firm's average and marginal tax rates? The firm's tax liability for the year is : (Round to the nearest dollar.) year Sanderson, Inc. had sales of $3.6 million. The firm's cost of goods sold came to $2.5 million, its operating expenses excluding deprecia $55,000 in dividend income (from a company in which it owned less than 20 percent of its shares) but paid $29,000 in the form of dividends ate the corporation's tax liability. What are the firm's average and marginal tax rates? (Round to the nearest dollar.) Data table