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Gunny Stores. Inc.. one of the nation's largest grocery retailers, reported the following information (adapted) in its comparative financial statements for the fiscal year ended January 31. 2015: Compute net profit margin ratio for the years ended January 31, 2015, and 2014. Did it improve or worsen in 2015? Compute asset turnover for the years ended January 31. 2015, and 2014. Did it improve or worsen in 2015? Compute return on assets for the years ended January 31, 2015, and 2014. Did it improve or worsen in 2015? Which component (net profit margin ratio or asset turnover) was mostly responsible