DELVEELE SI HI TEI (in millions) Domino's Pizza Koss Corporation March 2020 $280.8 2.1 June 2020 $249.0 3.9 Increase 24% 86X Domino's Pizza and Koss weren't the only companies stockpiling cash. A study of the largest nonfinar Koss Corporation reported the following amounts in its quarterly financial statements. Use this information to answer questions a and b below. (in thousands) December 31, 2019 March 31, 2020 Net Sales June 30, 2020 September 30, 2020 $ 4,123 $ 4,789 $ 3,948 $ 5,208 Net Income (Loss) (215) (97) 158 127 a. Calculate the net profit margin ratios (expressed as percentages, rounded to one decimal place) for the quarterly periods ended December 31, 2019 and March 31, 2020. December 31, 2019 Net Profit Margin Ratio March 31, 2020 Net Proft Margin Ratio The net profit margin ratios above indicate Koss profitable, b. Calculate the net profit margin ratios (expressed as percentages, rounded to one decimal place) for the quarterly periods ended June 30 and September 30, 2020. June 30, 2020 Net Profit Margin Ratio September 30, 2020 Net Profit Margin Ratio The net profit margin ratios above indicate Koss profitable in the quarter ended June 30 and profitable in the quarter ended September 30, 2020