Dulaney's Stores has posted the following yearly earnings and expenses. Click the icon to view the yearly data. a. Dulaney's current profit margin is %. (Enter your response rounded to one decimal place.) Dulaney's current yearly ROA is \%. (Enter your response rounded to one decimal place.) b. Suppose COGS and merchandise inventory were each cut by 15%. The new pretax profit margin is . (Enter your response rounded to one decimal place.) The new ROA is 257.4%. (Enter your response rounded to one decimal place.) c. Based on the current profit margin in part a., Dulaney would have to generate $ in additional sales in order to have the same effect on pretax earnings as a 15% decrease in merchandise costs. (Enter your response rounded to