Answer:
Step-by-step explanation:
The journal entries are shown below:
a. Cash A/c Dr $300,000 (15,000 × $20)
To Unearned Service revenue A/c $300,000
(Being unearned service revenue recorded)
b. Unearned Service revenue A/c Dr $25,000 (300,000 ÷ 12 month)
To Service revenue A/c $25,000
(Being the adjusting entry for December month is recorded)