Kiddle Worid uses a periodic inventory system and the retall inventory method to estimate ending inventory and cost of goods sold. The following data are avallable at the end of the year. tstimate ending inventory and cost of goods sold (average cost). Note: Round ratio calculation to 2 decimal places (i.e., 0.1234 should be enterart as 1234% ) Kiddle Worid uses a periodic inventory system and the retall inventory method to estimate ending inventory and cost of goods sold. The following data are avallable at the end of the year. tstimate ending inventory and cost of goods sold (average cost). Note: Round ratio calculation to 2 decimal places (i.e., 0.1234 should be enterart as 1234% )