Using the following amounts (in thousands) reported in Zebra Technologies consolidated balance sheets and statements of income at December 31, 2013 and 2012, and the valuation schedule analyze the accounts receivable and allowance accounts for all years 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 lI-Valuation and Qualifying Accounts Years Ended December 31, 2013 and 2012 Balance at Beginning of Period Balance Charged to Costs and Expenses Deductions at End of Period Allowance for 2013 $ 669 $373 $589 $453 doubtful accounts Allowance for doubtful accounts 2012 $1,560 $0 $891 $669 Allowance for doubtful accounts 2011 $1,459 $343 $242 $1,560