Suppose Loblaws, one of the nation's largest grocery retailers, reported the following information (adapted) for its fiscal year ended January 31, 2020.

{Requirements}
1. Compute return on assets for the years ended January 31, 2019 and 2020.
2. Did return on assets improve or deteriorate? What are some possible causes for this change?

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Net sales. Net earnings. Interest expense. Average total assets January 31, 2020 $48,815 $ 2,000 10 $33,699 January 31, 2019 $47,220 $ 1,773 S 10 $33,005