Impala Window Washing Services prepares adjustments monthly and shows the following selected accounts on its December 31 , 2020, unadjusted trial balance: Prepare the required monthly adjusting entries at December 31,2020 , based on the following additional information: a. The remaining balance in Prepaid Insurance was for a six-month insurance policy purchased for $7,200 and in effect on Sept. b. $4,800 of the balance in Prepaid office Rent had not been used as at December 31,2020. c. \$1,100 of the balance in Prepaid Subscriptions had been used as at December 31,2020. d. The company paid $32,400 on April 1, 2020, to rent equipment for a three-year period beginning April 1, 2020