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, analyse the accounts receivable and allowance accounts for all years. 2013 2012 $1,038,159 Net Sales Accounts receivable, net of allowances for doubtful accounts of $153 in 2013 and $669 in 2012 $996,168 $ 176,917 $168,732 Schedule II-Valuation and Qualifying Accounts Years Ended December 31, 2013 and 2012 Balance at Charged to Balance Beginning Costs and at End of Period Expenses Deductions of Period 2013 Allowance for $ 669 $373 $589 $ 453 doubtful accounts 2012 Allowance for $1,560 $ 0 $891 $ 669 doubtful accounts 2011 Allowance for $1459 $343 5242 $1,560 doubtful accounts Extracted from 10-K filings for Zebra Technologies 2013. Obtained from US Securities and Exchange Commission www.sc.gov