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 31, December 30, 2018 2017 $ 4,229 1,380 134 $ 4,337 1,401 127 Required a. Compute Ramirez Restaurant Group's gross margin percentage for 2018 and 2017. (Enter your answers as a percentage rounded to 1 decimal place (i.e., 0.123 should be entered as 12.3).) b. Compute Ramirez Restaurant Group's return-on-sales percentage for 2018 and 2017. (Enter your answers as a percentage rounded to 1 decimal place (i.e., 0.123 should be entered as 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? a. Gross margin percentage b. Return-on-sales percentage c. Did Ramirez Restaurant Group's performance get better or worse from 2017 to 2018? Drov 2018 2017 200 % % % % -