Big Box Store has operated with a 30% average gross profit ratio for a number of years. It had $110,000 in sales during the second quarter of this year. If it began the quarter with $19,000 of inventory at cost and purchased $73,000 of inventory during the quarter, its estimated ending inventory by the gross profit method is: Multiple Choice $30,000. $33,000. $15,000. $19,000. $23,100.