Loblaw reported sales of $31,250 million, cost of goods sold of $23,894 million, and profit of $769

Question:

Loblaw reported sales of $31,250 million, cost of goods sold of $23,894 million, and profit of $769 million for a recent year. Its total assets were $16,841 million at the beginning of the year and $17,428 million at the end of the year. Calculate the
(a) Gross profit margin,
(b) Profit margin,
(c) Asset turnover, and
(d) Return on assets ratios?