98 CHAPTER 2 The Balance Sheet 2013 2012 Net Sales Accounts receivable, net of allowances for doubtful accounts of $453 in 2013 and $669 in 2012 $1,038,159 $996,168 $ 176,917 $168,732 Schedule II-Valuation and Qualifying Accounts Years Ended December 31, 2013 and 2012 Balance at Charged to Beginning Costs and of Period Expenses Deductions Balance at End of Period 2013 Allowance for $ 669 $373 $589 $ 453 doubtful accounts 2012 Allowance for $1,560 $ 0 $891 $ 669 doubtful accounts 2011 Allowance for $1,459 $343 $242 $1,560 doubtful accounts Extracted from 10-K filings for Zebra Technologies 2013. Obtained from U.S. Securities and Exchange Commission. www.sec.gov.