Answer:
Accounting uses the Revenue recognition principle which means that a business should only recognize revenue when it has provided the service for which it was paid for.
a.
Date Account Title Debit Credit
12/31/2016 Cash $16,000
Sales Revenue $16,000
Working
= 4,000 issues sold for December * $4 per copy
= $16,000
Date Account Title Debit Credit
12/31/2016 Cash $216,000
Unearned Subscription Revenue $216,000
Working
= 6,000 subscriptions * $36 per subscription
= $216,000
b.
Date Account Title Debit Credit
12/31/2016 Unearned Subscription Revenue $18,000
Sales revenue $18,000
Working
= 216,000 * 1/ 12 months
= $18,000