The income statement of Ellen Corporation for the years 2018 and 2019 showed the following gross profit calculation 2019 2018 Sales Revenue $91,000 $71,000 Cost of Goods Sold $66,000 $52,000 Gross Profit $25,000 $19,000 a) Calculate the gross profit margins for both years. Do not enter dollar signs or commas in the input boxes Round the gross profit margin to 2 decimal places 2019 2018 Gross Profit Margin % % b) in which year does Ellen Corporation have a better gross profit margin? Year