ABC Company estimated its bad debts equal to 2.5% of its $850,000 credit sales for the year 2010. On December 31, 2010 ABC Company made an adjustment for the 2.5% amount. On July 1, 2011 the management decided that $2,000 account of Mary Smith was uncorrectable and wrote it off using Allowance for Doubtful Accounts. On December 31, 2011 Mary Smith returned and paid her account in full. Please prepare the required journal entries for the above events