In 2015, Canadian Tire reported sales revenue of $12,279.6 million, cost of goods sold of $7,747.1 million,

Question:

In 2015, Canadian Tire reported sales revenue of $12,279.6 million, cost of goods sold of $7,747.1 million, and net income of $735.9 million. In 2014, it reported sales revenue of $12,462.9 million, cost of goods sold of $8,033.2 million, and net income of $639.3 million.
(a) Calculate the gross profit margin and profit margin for each year.
(b) Comment on Canadian Tire's changing profitability.