Please help me understand what I got wrong thank you.

Exercise 12.4 Computing adjustments for accrued and prepaid expense items. LO 12-2

1. On December 31, 2019, the Notes Payable account at Northwood Manufacturing Company had a balance of $16,000. 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 $6,050 in cash. On December 31, 2019, an inventory of supplies showed that items costing $1,550 were on hand. The Supplies account has a balance of $6,050
3. On September 1, 2019, North Dakota Manufacturing paid a premium of $12,720 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 $13,440 to pay the total amount owed. On December 31, 2019, the Prepaid Advertising account has a balance of $13,440.

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.)

General Journal Credit No 1 Date Dec 31, 2019 Debit 120.00 Interest expense Interest payable 120.00 X Dec 31, 2019 4,500.00 Supplies expense Supplies 4,500.00 Dec 31, 2019 4,240.00 Insurance expense Prepaid insurance 4,240.00 Dec 31, 2019 Advertising expense 1,120.00 Prepaid advertising 1,120.00 X