Answer:
January 1, 2018
Dr Investment in bonds 220,000,000
  Cr Cash 201,000,000
  Cr Discount on investment in bonds 19,000,000
June 30, 2021
Dr Cash 8,800,000
Dr Discount on investment in bonds 1,250,000
  Cr Interest revenue 10,050,000
December 31, 2018
Dr Cash 8,800,000
Dr Discount on investment in bonds 1,312,500
  Cr Interest revenue 10,112,500
discount amortization = ($201,000,000 x 5%) - $8,800,000 = $1,250,000
discount amortization = ($202,250,000 x 5%) - $8,800,000 = $1,312,500