Answer:
bond securities 335,654.22 debit
cash 335,645.22 credit
--to record purchase of bonds--
cash 37,440 debit
interest revenue 33,564.52
bond securities 3,875.48
--to record interest revenue on the bonds--
bonds securities 1,821.26
unrealized holding gain 1,821.26
--to record recognition of fair value for the year ended Dec 31th 2017--
unrealized holding loss 8,620 debit
bonds securities 8,620 credit
-- to record recognition of fair vale for 2018--
Step-by-step explanation:
a) we record the bonds for the amount we purchased, we make adjustment at year-end for any difference if needed
b)
312,000 x 12% = 37,440 cash proceeds
335,645.22 x 10% = 33,564.52 interest revenue
amortization 3,875.48
c) fair value: 333,600
book value: (331. 778,74)
unrealized gain 1,821.26
d)
37,440 - 333,600 x 10% = 4,080 amortization for the year
fair value at 2018 year-end $ 320,900
book value at 2018 $ 329,520
unrealized holding loss (8,620)