During December, Sheridan Appliance Company sold appliances to Concord Company for $26,430. Sheridan is unable to determine Concord's ability to pay the amount owing. Concord pays the full amount due in February of the following year. Sheridan uses the earnings approach to revenue recognition. Identify the critical event that will trigger revenue recognition. Prepare the journal entry to record the shipment of goods to Concord. The goods cost Sheridan $18,860 and Sheridan uses a perpetual inventory system. (Credit account titles are automatically indented when the amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter O for the amounts.) Account Titles and Explanation Debit Credit (To record deferred gross profit.)