Clothing Stores Inc. has operating segments defined by geographic regions. Below is the information that was provided in the notes related to these segments: (in millions of Canadian dollars) Canada United States Europe Revenues 2,519 5,985 1,598 Gross margin 964 1,713 633 Operating expenses (586 ) (1,478 ) (495 ) Depreciation and amortization included in operating expenses 148 255 173 Total assets 3,434 7,625 1,615 Total liabilities 1,710 5,855 585 Required: 1. Calculated the ratios using the information. ROA-using year ending balances only