Balance at

Additions

Changes to

Balance at

beginning

charged to

reserve, net(1)

end of year

of year

earnings

Year ended December 31, 2015

Allowance for doubtful accounts

$

$

$

$

Reserves for inventory

Valuation of deferred tax assets

 -

Year ended December 31, 2014

Allowance for doubtful accounts

$

$

$

$

Reserves for inventory

Valuation of deferred tax assets

 -

Year ended December 31, 2013

Allowance for doubtful accounts

$

$

$

$

Reserves for inventory

Valuation of deferred tax assets

 -

(1)

Increases (deductions) from the allowance for doubtful accounts equal accounts receivable written off and increases related to acquired businesses, less recoveries, against the allowance. Increases (deductions) from the reserves for inventory excess and obsolete items equal inventory written off against the reserve as items were disposed of and increases for related to acquired businesses. Increases (deductions) to the valuation of deferred tax assets relate to the reversals due to changes in management’s judgments regarding the future realization of the underlying deferred tax assets.