Answer:
1) December 31, 2021, accrued rental revenue
Dr Deferred rental revenue 1,200
  Cr Rental revenue 1,200
2) December 31, 2021, accrued insurance expense
Dr Insurance expense 5,640
  Cr Prepaid insurance 5,640
3) December 31, 2021, accrued wages and salaries
Dr Wages expense 1,400
  Cr Wages payable 1,400
4) December 31, 2021, accrued interests on notes payable
Dr Interest expense 140
  Cr Interest payable 140
5) December 31, 2021, supplies expense
Dr Supplies expense 2,300
  Cr Supplies 2,300
Explanation:
the original transactions were:
1) Dr Cash 2,400
  Cr Deferred rental revenue 2,400
2) Dr Prepaid insurance 11,280
  Cr Cash 11,280
3) Dr Wages expense 1,400
  Cr Wages payable
4) Dr Cash 7,000
  Cr Notes payable 7,000
5) carrying balance of supplies $840
Dr Supplies 1,800
  Cr Cash 1,800