For each of the following accounts, signify DEBIT or CREDIT to indicate the normal balance of the account.

1.Accounts receivable

2.Credit card expense

3.Bad debt expense

4.Allowance for doubtful accounts

5.Notes receivable (due in 180 days)

6.Interest revenue

7.Depreciation expense

8.Building

9.Equipment

10.Accumulated depreciation

11.Loss on disposal of equipment

12.Gain on disposal of equipment

13.Sales revenue

14.Patent

15.Copyright

16.Amortization expense

17.Estimated warranty liability (3 year warranty)

18.Social security taxes payable

19.Notes payable (due in 120 days)