For each of the following accounts, signify DEBIT or CREDIT to indicate the normal balance of the account.
1	Accounts recievable		Multiple Choice Answer Options:
2	Credit card expense		a. Credit
3	bad debt expense		b. Debit
4	allowance for doubtful debts
5	Notes receivable (due in 180 days)
6	interest revenue
7	depreciation expense
8	building
9	equipment
10	accumulated depreciation
11	Loss of 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 180 days)