Answer::
A journal entry is the act of keeping or making records of any transactions. These transactions are listed in an accounting journal that shows a company's debit and credit balances.
Using the data in the question (above), the journal entries for January 31 and March 09 go as follows:
No ------------------Date----------------General Journal------------- Debit-----------Credit
1. Jan 31 --------Alowance for doubtful accounts ------- $2,200 (Debit)
-- ------------------ Accounts receivable—C. Green -------- $2,200 (Credit)
2. Mar 09 -------Accounts receivable—C. Green --------$1,700 (Debit)
----_----------------Allowance for doubtful accounts ------ $1,700 (Credit)
3. Mar 09 ------- Cash ---------- $1,700 (Debit)
-----------------------Accounts receivable—C. Green -------- $1,700 (Debit)