1. On Jan1, business bought one equipment for $36,000. The estimated useful life is 5 years with no residue value. 2. On Jan31, 2020, Business checked prepaid (unexpired) insurance policy remaining 16,500. And business previously already paid $18,000 for the whole insurance for 2020. 3. On Jan1, 2020 the business had $920 office supplies. And the additional office supplies $250 were purchased during the month. Now on Jan31, 2020, there were only $530 of supplies left over there on hand. 4. Three-fourth of the work for $10,000 service fees received in advance has been performed during