As of December 31 ($ 000s) 2015 2014 2013 Cash and cash equivalents Accounts receivable (less allowances for doubtful accounts of $22.288, $22.121, $20.096 respectively) Inventories, net Prepaid expenses and other assets Deferred income taxes Prepaid income taxes Total current assets $290.136 $226.644 $430,644 1,209,641 1.172.924 1,101,656 1,414.177 1,356,396 1,305,520 85,670102,669 115,331 061.387 75,819 49,01847.529 15,315 $3,048,642 $2967.549 $3,044,285 Grainger reports the following footnote relating to its receivables. Allowance for Doubtful Accounts: The following table shows the activity in the allowance for doubtful accounts. For Years ended December 31 ($ 000s) 201520142013 $22,121 $20,096 $19,449 10,181 12,945 8,855 Write-off of uncollectible accounts, net of recoveries (10,495) (9,628) (7.942) 481 (1.292) (266) $22,288 $22,121 $20,096 Balance at beginning of period Provision for uncollectible accounts Business cquistions foreign currency and other481 1299 60) Balance at end of period