Answer:
1. Dec 31
Dr Cash $8,400
Cr Unearned subscription revenue $8,400
2. Jan 31
Dr Unearned subscription revenue $700
Cr Subscription revenue $700
3. Dec 31
Dr Supplies $840
Cr Cash $840
4. Jan 31
Dr Supplies expense $140
Cr Supplies $140
5. Dec 31
Dr Cash $2,100
Cr Unearned service revenue $2,100
6. Jan 31
Dr Unearned service revenue $700
Cr Service revenue $700
Step-by-step explanation:
Preparation of the journal entries to record the initial transaction on December 31 and the adjustment required on January 31
1. Dec 31
Dr Cash $8,400
Cr Unearned subscription revenue $8,400
2. Jan 31
Dr Unearned subscription revenue $700
($8,400/12)
Cr Subscription revenue $700
3. Dec 31
Dr Supplies $840
Cr Cash $840
4. Jan 31
Dr Supplies expense $140
Cr Supplies $140
5. Dec 31
Dr Cash $2,100
Cr Unearned service revenue $2,100
6. Jan 31
Dr Unearned service revenue $700
($2,100/3)
Cr Service revenue $700