a. Compute the gross profit margin (GPM) for each of these companies for 2013 and 2012. Note: Round GPM answers to one decimal place (ex: 0.2345=23.5% ). b. Compute the inventory turnover ratio and the average inventory days outstanding for 2013 for each company. Do not round until your final answer. Round inventory turnover to one decimal place. Round average inventory days outstanding to nearest whole numbe