advance auto parts , inc . and subsidiaries notes to the consolidated financial statements december 31 , 2011 , january 1 , 2011 and january 2 , 2010 ( in thousands , except per share data ) 2011-12 superseded certain pending paragraphs in asu 2011-05 201ccomprehensive income 2013 presentation of comprehensive income 201d to effectively defer only those changes in asu 2011-05 that related to the presentation of reclassification adjustments out of accumulated other comprehensive income . the adoption of asu 2011-05 is not expected to have a material impact on the company 2019s consolidated financial condition , results of operations or cash flows . in january 2010 , the fasb issued asu no . 2010-06 201cfair value measurements and disclosures 2013 improving disclosures about fair value measurements . 201d asu 2010-06 requires new disclosures for significant transfers in and out of level 1 and 2 of the fair value hierarchy and the activity within level 3 of the fair value hierarchy . the updated guidance also clarifies existing disclosures regarding the level of disaggregation of assets or liabilities and the valuation techniques and inputs used to measure fair value . the updated guidance is effective for interim and annual reporting periods beginning after december 15 , 2009 , with the exception of the new level 3 activity disclosures , which are effective for interim and annual reporting periods beginning after december 15 , 2010 . the adoption of asu 2010-06 had no impact on the company 2019s consolidated financial condition , results of operations or cash flows . 3 . inventories , net : merchandise inventory the company used the lifo method of accounting for approximately 95% ( 95 % ) of inventories at december 31 , 2011 and january 1 , 2011 . under lifo , the company 2019s cost of sales reflects the costs of the most recently purchased inventories , while the inventory carrying balance represents the costs for inventories purchased in fiscal 2011 and prior years . as a result of utilizing lifo , the company recorded an increase to cost of sales of $ 24708 for fiscal 2011 due to an increase in supply chain costs and inflationary pressures affecting certain product categories . the company recorded a reduction to cost of sales of $ 29554 and $ 16040 for fiscal 2010 and 2009 , respectively . prior to fiscal 2011 , the company 2019s overall costs to acquire inventory for the same or similar products generally decreased historically as the company has been able to leverage its continued growth , execution of merchandise strategies and realization of supply chain efficiencies . product cores the remaining inventories are comprised of product cores , the non-consumable portion of certain parts and batteries , which are valued under the first-in , first-out ( "fifo" ) method . product cores are included as part of the company's merchandise costs and are either passed on to the customer or returned to the vendor . because product cores are not subject to frequent cost changes like the company's other merchandise inventory , there is no material difference when applying either the lifo or fifo valuation method . inventory overhead costs purchasing and warehousing costs included in inventory , at fifo , at december 31 , 2011 and january 1 , 2011 , were $ 126840 and $ 103989 , respectively . inventory balance and inventory reserves inventory balances at year-end for fiscal 2011 and 2010 were as follows : inventories at fifo , net adjustments to state inventories at lifo inventories at lifo , net december 31 , $ 1941055 102103 $ 2043158 january 1 , $ 1737059 126811 $ 1863870 .
what percentage did ne inventories at lifo increase over the year?
advance auto parts , inc . and subsidiaries notes to the consolidated financial statements december 31 , 2011 , january 1 , 2011 and january 2 , 2010 ( in thousands , except per share data ) 2011-12 superseded certain pending paragraphs in asu 2011-05 201ccomprehensive income 2013 presentation of comprehensive income 201d to effectively defer only those changes in asu 2011-05 that related to the presentation of reclassification adjustments out of accumulated other comprehensive income . the adoption of asu 2011-05 is not expected to have a material impact on the company 2019s consolidated financial condition , results of operations or cash flows . in january 2010 , the fasb issued asu no . 2010-06 201cfair value measurements and disclosures 2013 improving disclosures about fair value measurements . 201d asu 2010-06 requires new disclosures for significant transfers in and out of level 1 and 2 of the fair value hierarchy and the activity within level 3 of the fair value hierarchy . the updated guidance also clarifies existing disclosures regarding the level of disaggregation of assets or liabilities and the valuation techniques and inputs used to measure fair value . the updated guidance is effective for interim and annual reporting periods beginning after december 15 , 2009 , with the exception of the new level 3 activity disclosures , which are effective for interim and annual reporting periods beginning after december 15 , 2010 . the adoption of asu 2010-06 had no impact on the company 2019s consolidated financial condition , results of operations or cash flows . 3 . inventories , net : merchandise inventory the company used the lifo method of accounting for approximately 95% ( 95 % ) of inventories at december 31 , 2011 and january 1 , 2011 . under lifo , the company 2019s cost of sales reflects the costs of the most recently purchased inventories , while the inventory carrying balance represents the costs for inventories purchased in fiscal 2011 and prior years . as a result of utilizing lifo , the company recorded an increase to cost of sales of $ 24708 for fiscal 2011 due to an increase in supply chain costs and inflationary pressures affecting certain product categories . the company recorded a reduction to cost of sales of $ 29554 and $ 16040 for fiscal 2010 and 2009 , respectively . prior to fiscal 2011 , the company 2019s overall costs to acquire inventory for the same or similar products generally decreased historically as the company has been able to leverage its continued growth , execution of merchandise strategies and realization of supply chain efficiencies . product cores the remaining inventories are comprised of product cores , the non-consumable portion of certain parts and batteries , which are valued under the first-in , first-out ( "fifo" ) method . product cores are included as part of the company's merchandise costs and are either passed on to the customer or returned to the vendor . because product cores are not subject to frequent cost changes like the company's other merchandise inventory , there is no material difference when applying either the lifo or fifo valuation method . inventory overhead costs purchasing and warehousing costs included in inventory , at fifo , at december 31 , 2011 and january 1 , 2011 , were $ 126840 and $ 103989 , respectively . inventory balance and inventory reserves inventory balances at year-end for fiscal 2011 and 2010 were as follows : inventories at fifo , net adjustments to state inventories at lifo inventories at lifo , net december 31 , $ 1941055 102103 $ 2043158 january 1 , $ 1737059 126811 $ 1863870 .