Shamrock Trading uses a perpetual inventory system and the earnings approach to recognize revenue. The company offers credit terms to select customer. The following are transactions of Shamrock Trading with some of its customers. Feb.5 6 11 Sold merchandise to Classen for $54,000, terms 1/10, n/60. Classen returned $5,400 of merchandise. Wrote off an account receivable from B. Wong of $1,600, after making repeated efforts to collect. Classen paid Shamrock the amount owing. Collected $860 from a collection agency who managed to collect an account from Mancini that had been previously written off by Shamrock. 15 28 Prepare the journal entries to record the above transactions. Ignore any inventory or cost of goods sold entries for the purposes of this question. (Credit account titles are automatically indented when the amount is entered. Do not indent manually. Record journal entries in the order presented in the problem.) Date Account Titles and Explanation Debit Credit (To record sale on account.) Feb. 15