Kania, D.D.S., opened a dental practice on January 1st. During the first month of operations the following transactions occurred. 1. Performed services for patients during the month. At January 31, $375 of such services were performed but not yet billed. 2. Utility expenses incurred but not paid prior to January 31 totaled $500. 3. Purchased dental equipment on January 1 for $40,000, paying $10,000 in cash and signing a $30,000, 3-year note payable. The equipment depreciates $200 per month. Interest incurred but unpaid at the end of January was $250. 4. Purchased a one-year malpractice insurance policy on January 1 for $6,000. 5. On January 1, recorded the purchase of $800 of dental supplies. On January 31, determined that $550 of those supplies were used during the month. Required: Prepare the adjusting journal entries on January 31. [Note: In this homework problem, be sure to prepare adjusting journal entries (i.e., in journal entry form) and not simply T-accounts --- even though you might use T-accounts to help you analyze some of the adjusting entries.]