Answer:Please see explanation for answers
Step-by-step explanation:
1. Journal to record the investment in bonds 
Date Account title and explanation Debit Credit
July, 1 2018 Investment in Bonds $300,000,000 
 To Premium on Bond Investment $50,000,000 
 To Cash $350,000,000
2. To record interest on Bonds
Date Account title and explanation Debit Credit
December 31,2018 Cash $9,000,000
 (300,000,000 x 6% x 6/12)
 Interest Revenue
($350,000,000 × 4% x 6/12) $7,000,000
 To Premium on bonds $2,000,000
3. The Amount to be reported in balance sheet is
 Investment in Bonds $300,000,000
+Premium on bonds 
(Original Premium $50,000,000 -Amortization (2,000,000) =48,000,000
Amount to be reported in Balance sheet= $348,000,000
4. Date Account title and explanation Debit Credit 
January 2, 2019 Cash $360,000,000
 To gain on sale $12,00,000 ($348,000,000 - $360,000,000)
 To Investment in bonds $300,000,000 
 To Premium on bonds $48,000,000