Correcting an inventory error---two years

Great Foods Grocery reported the following comparative income statements for the years ended June 30, 2015:

Great Food Grocery Income statements Years ended June 30, 2016 and 2015
Sales revenue	$13,900	$120,000
Cost of goods sold:
Beginning merchandise inventory	$13,000	$12,000
Net cost of purchase	76,00	70,00
Cost of goods available for sale	89,000	82,000
Less: ending merchandise inventory	17,000	13,000
Cost of goods sold	72,000	69,000
Gross profit	67,000	51,000
Operating expenses	23,000	18,000
Net income	$44,000	$33,000