Ramirez Restaurant Group's is the corporation behind several popular restaurant chains. The following data were taken from its 2018 annual report. All dollar amounts are in millions Total restaurant sales Cost of goods sold Net income Fiscal Years Ending December 30, December 31 2018 2017 $4,481 $ 4,589 1,506 1,527 170 163 Required o. Compute Ramirez Restaurant Group's gross margin percentage for 2018 and 2017 (Enter your answers as a percentage rounded to 1 decimal place (le., 0.123 should be entered as 12.3).) b. Compute Ramirez Restaurant Group's retum-on-sales percentage for 2018 and 2017 (Enter your answers as a percentage rounded to 1 decimal place (.e., 0.123 should be entered os 12.3). c. Based on the percentages computed in Requirements a and b, did Ramirez Restaurant Group's performance get better or worse from 2017 to 2018? 2018 2017 % a. Gross margin percentage b. Return-on-sales percentage c Did Ramirez Restaurant Group's performance get better or worse from 2017 to 2018? % % Better Lee Grocery and Green Grocery are two major grocery chains. The following data were taken from these companies' 2018 annual reports. All dollar amounts are in millions. Sales Cost of goods sold Net income Lee Grocery February 2, 2019 $ 125,962 96,494 6,310 Green Grocery December 29, 2019 $ 41,196 27,911 3,501 Required b. Calculate the gross margin percentages for Lee Grocery and Green Grocery c. Calculate the return-on-sales percentages for Lee Grocery and Green Grocery (For all requirements, enter your answers as a percentage rounded to 1 decimal place (i.e., 0.123 should be entered as 12.3).) b Gross margin percentage Return-on-sales percentage Lee Grocery 96 % Green Grocery % % C