1-1 Percentage change in accounts receivable, net of allowance for doubtful accounts, from 2012 to 2013.

1-2Percentage change in allowance for doubtful accounts from 2012 to 2013.

1-3 Allowance account as a percentage of accounts receivable for 2012.

1-4 Allowance account as a percentage of accounts receivable for 2013.

1-5Answer the multiple-choice question for the answers derived in parts e and f.

2013 2012 Net Sales $1,038,159 $996,168 Accounts receivable, net of allowances for doubtful accounts of $453 in 2013 and $669 in 2012 $ 176,917 $168,732 Schedule II-Valuation and Qualifying Accounts Years Ended December 31, 2013 and 2012 Balance at Charged to Costs and Expenses Balance at End of Period Beginning of Period Deductions $669 2013 Allowance for doubtful accounts $373 $589 453 Allowance for doubtful accounts $1,560 0 2012 $891 669 Allowance for doubtful accounts $1,459 $343 $242 $1,560 2011 2013 2012 Net Sales $1,038,159 $996,168 Accounts receivable, net of allowances for doubtful accounts of $453 in 2013 and $669 in 2012 $ 176,917 $168,732 Schedule II-Valuation and Qualifying Accounts Years Ended December 31, 2013 and 2012 Balance at Charged to Costs and Expenses Balance at End of Period Beginning of Period Deductions $669 2013 Allowance for doubtful accounts $373 $589 453 Allowance for doubtful accounts $1,560 0 2012 $891 669 Allowance for doubtful accounts $1,459 $343 $242 $1,560 2011