Maquoketa Valley Resort opened for business on June 1 with eight air-conditioned units. Its trial balance before adjustment on August 31 is presented here. Other data: 1. Insurance expires at the rate of $450 per month. 2. A count of supplies on August 31 shows $700 of supplies on hand. 3. Annual depreciation is $6,600 on buildings and $4,000 on equipment. 4. Unearned rent of $5,000 was earned prior to August 31. 5. Salaries of $600 were unpaid at August 31. 6. Rentals of $1,600 were due from tenants at August 31. (Use Accounts Receivable.) 7. The mortgage interest rate is 9% per year. (The mortgage was taken out August 1.) Instructions (a) Journalize the adjusting entries on August 31 for the 3-month period June 1