Helen Martin, D.D.S. opened a dental practice on January 1, 2020. During the first month of operations, the following transactions occurred 1 2 3 Performed services for patients who had dental plan insurance At January 31, $815 of such services was performed but not yet billed to the insurance companies. Utility expenses incurred but not paid prior to January 31 totaled $490. Purchased dental equipment on January 1 for $78,000, paying $18,000 in cash and signing a $60,000. 3-year note payable (a) The equipment depreciates $387 per month. (b) Interest is $530 per month Purchased a one-year malpractice insurance policy on January 1 for $12,480 Purchased $1,628 of dental supplies. On January 31, determined that $510 of supplies were on hand. 4 5. Prepare the adjusting entries on January 31, Account titles are Accumulated Depreciation-Equipment, Depreciation Expense Service Revenue Accounts Receivable, Insurance Expense, Interest Expense. Interest Payable, Prepaid Insurance, Supplies, Supplies Expense, Utilities Expenses and Accounts Payable. (Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No entry" for the account titles and enter for the amounts.) Account Titles and Explanation Debit Credit Accounts Receivable 815 Service Revenue 815 No. 1. 2 Utilities Expenses 490 490 Accounts Payable 3.(a) Equipment 3. (b) 4 5 Supplies Expense Supplies