The following information is for Grouper Enterprises Ltd.: Using the above information, prepare monthly income statements (as far as the data permit) in columnar form for February, March, and April. Show the inventory in the statement at cost; show the gain or loss due to fluctuations in NRV separately. Grouper uses the indirect or allowance method. (Enter negative amounts using either a negative sign preceding the number e.g. -45 or parentheses e.g. (45).) Prepare the journal entry that is needed to establish the valuation account at January 31 and the entries to adjust it at the end of each month after that. (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.)