Grouper Company sold $9,140 of its specialty shelving to Elkins Office Supply Co. on account. Prepare the entries when (a) Grouper makes the sale. (If no entry is required, select "No Entry" for the account titles and enter O for the amounts. Credit account titles are automatically indented when the amount is entered. Do not indent manually.) Account Titles and Explanation Debit Credit (b) Grouper grants an allowance of $632 when some of the shelving does not meet exact specifications but still could be sold by Elkins. (If no entry is required, select "No Entry" for the account titles and enter O for the amounts. Credit account titles are automatically indented when the amount is entered. Do not indent manually.) Account Titles and Explanation Debit Credit (c) at year-end. Grouper estimates that an additional $219 in allowances will be granted to Elkins. (If no entry is required, select "No Entry" for the account titles and enter O for the amounts. Credit account titles are automatically indented when the amount is entered. Do not indent manually.) Account Titles and Explanation Debit Credit