On January 1, 2021, Christine and Ian Hacker Inc. (CIHI) issued (sold) $600,000 of 8%, six-year, convertible bonds for gross proceeds of $660,000. Each $1,000 bond was convertible into 20 no par value common shares. Similar non-convertible bonds were yielding 9% at that time. Interest was payable semi-annually on June 30 and December 31. 

On July 1, 2025, all bondholders exercised the conversion option and converted the bonds to common shares. The interest payment had been made on June 30, 2025, in the normal fashion. 

The company prepares its financial statements in accordance with ASPE. CIHI elects to determine interest expense using the straight-line method and account for the conversion option using the zero common equity method.

Required: 

Prepare journal entries to record: 

a. The issuance of the convertible bonds on January 1, 2021. 

b. Payment of interest and related amortization on June 30, 2021. 

c. Payment of interest and related amortization on June 30, 2025. 

d. Conversion of the bonds on July 1, 2025.