Bridgeport Company sold $8,780 of its specialty shelving to Elkins Office Supply Co. on account. Bridgeport estimates that an additional $215 in allowances will be granted to Elkins. Prepare the entries when (a) Bridgeport makes the sale. (If no entry is required, select "No Entry" for the account titles and enter 0 for the amounts. Credit account titles are automatically indented when the amount is entered. Do not indent manually.) (b) Bridgeport grants an allowance of $722 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 0 for the amounts. Credit account titles are automatically indented when the amount is entered. Do not indent manually.) (c) at year-end. (If no entry is required, select "No Entry" for the account titles and enter 0 for the amounts. Credit account titles are automatically indented when the amount is entered. Do not indent manually.)