Garden World uses the retail method to estimate its monthly cost of goods sold and month-end inventory. At May 31, the accounting records indicate the cost of goods available for sale during the month (beginning inventory plus purchases) totaled $550,000. These goods had been priced for resale at $1,000,000. Sales in May totaled $400,000. The estimated inventory at May 31 is: Multiple Choice $220,000. $330,000. $550,000. $400,000.