1. On December 31, 2019, the Notes Payable account at Northwood Manufacturing Company had a balance of $15,500. This balance represented a three-month, 9 percent note issued on November 1.
2. On January 2, 2019, Hitech Computer Consultants purchased flash drives, paper, and other supplies for $6,020 in cash. On December 31, 2019, an inventory of supplies showed that items costing $1,540 were on hand. The Supplies account has a balance of $6,020
3. On September 1, 2019, North Dakota Manufacturing paid a premium of $12,600 in cash for a one-year insurance policy. On December 31, 2019, an examination of the insurance records showed that coverage for a period of four months had expired.
4. On May 1, 2019, Headcase Beauty Salon signed a one-year advertising contract with a local radio station and issued a check for $13,320 to pay the total amount owed. On December 31, 2019, the Prepaid Advertising account has a balance of $13,320.

For each of the above independent situations, prepare the adjusting entries that must be made on the December 31, 2019, worksheet assuming no previous adjusting entries have been made during the year. (Round your answers to 2 decimal places.)