Figure out return on common stockholders equity

one of the largest grocery retailers in the United States, is headquartered in Minneapolis. Suppose the following financial information (in millions) was taken from the annual report: net sales $45, 100, net income $455, beginning stockholder's equity $2, 710 equity $2, 710, and ending stockholder's equity $3, 035. There were no devices paid on preformed stock. Compute the return on common stockholder's equity