In 2018, Alpha Company had $48,300,000 in Sales/Revenues, $15,600,000 in Costs of Goods Sold (COGS), $4,000,000 in Sales, General, and Administrative (SG\&A) expenses, $2,600,000 in Depreciation expenses, $530,000 in interest payment, and $3,585,000 in taxes. The firm also paid $2,100,000 in dividends to shareholders that year. Given the facts above, what was the average tax rate of the firm in 2018 ? 16.58% 14.02% 15.11% 17.11%