Journalize the following December 31 2020 transactions for J. Dufour Services : 1. Equipment cost $ 36 000 is expected to be useful for 3 years, with a residual value of $6000.Calculate and record amortization for the year. 2. The beginning balance of supplies was $ 3 400. During the year $ 4 600 of supplies have been purchased. At December 31 the supplies on hand totalled $ 2 000. Calculate and record the supplies expense of the year 3. The business incurred 260 $ of interest on a note to be paid next January 4. The J. Dufour Services prepaid one year of insurance coverage on july 1st of the courant year: 6 000$ Record the insurance expense of the period ended December 31 5. The J. Dufour Services billed customers 7 500 $ for services performed. 6. The business earned 2 500 $ of unearned revenue