Lafayette Co.'s long-term available-for-sale portfolio at the start of this year consists of the following. Available-for-Sale Securities Cost Fair Value Company A bonds $ 684,770 $ 599,850 Company B notes 190,900 186,750 Company C bonds 732,170 822,090 Lafayette enters into the following transactions involving its available-for-sale debt securities this year. January 29 Sold one-half of the notes of Company B for $94,620. July 6 Purchased bonds of Company X for $129,200. November 13 Purchased notes of Company Z for $316,000. December 9 Sold all of the bonds of Company A for $671,075.