The allowance for doubtful debts account has a balance at the start of the year of $2000. At the end of the year debts of $880, including $80 GST, are to be written off and the allowance for doubtful debts is to be adjusted to 10% of the closing accounts receivable balance of $33 000 (including $3000 GST). The amount for bad and doubtful debts appearing in the statement of financial performance for the year w be: a. $3300. O b. $1800 O c. $3300. O d. $1200