How do I calculate the cost of goods purchased for the year 2015 with just the following information: ending inventory for 2015 is 1626 ending inventory for 2014 is 1618, net sales for 2015 are 14547 net sales for 2014 are 14667, cogs & expenses for 2015 are 9296 and for 2014 they are 8786

how do I calculate the cost of goods purchased for the year 2015 with just the following information: ending inventory for 2015 is 1626 ending inventory for 2014 is 1618, net sales for 2015 are 14547 net sales for 2014 are 14667, cogs & expenses for 2015 are 9296 and for 2014 they are 8786