(dollars in millions) 2018 2016 $592.30 2017 $553.20 $486.80 (430.40) (397.80) (352.10) 161.90 135.40 134.70 (111.60) (106.90) (91.40) 50.30 48.50 43.30 (7.20) (7.60) (4.00) 2.50 3.10 2.70 45.60 44.00 42.00 (17.30) (16.50) (15.50) $28.30 $27.50 $26.50 Net sales Cost of sales Gross profit Selling, general, and administrative expenses Income from operations (EBIT) Interest expense Other income Income before taxes Taxes Net income Common-Size Income Statement Sales/Sales Cost of sales/Sales Gross profit margin SG&AE margin Operating profit margin (EBIT margin) Interest expense/Sales Other income/Sales Income before taxes/Sales Taxes/Sales 2018 2017 2016 2015 $420.00 (289.80) 130.20 (85.50) 44.70 (1.90) 2.10 44.90 (20.30) $24.60 2015 Perplexed by the declining profit margin and the rate of growth of Q CORP's net income, Mary Hampton pressed the company management for more detailed information. The management asks you, one of Q CORP's financial analysts, to compute component and percentage changes for the following statements and determine if there were any positive or negative trends