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statements december 31 , 2011 , january 1 , 2011 and january 2 , 2010 ( in thousands , except per share data ) 2011-12 superseded certain pending paragraphs in asu 2011-05 201ccomprehensive income 2013 presentation of comprehensive income 201d to effectively defer only those changes in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 .
[['', 'december 312011', 'january 12011'], ['inventories at fifo net', '$ 1941055', '$ 1737059'], ['adjustments to state inventories at lifo', '102103', '126811'], ['inventories at lifo net', '$ 2043158', '$ 1863870']]
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 .

Question: what percentage did ne inventories at lifo increase over the year?
Answer: 9.6%
Explanation: to find the percentage increase in net inventories for lifo , one must subtract the end of the year by the begining of the year , then dvidie the answer by the beginning of the year .