Can someone please explain the "cumulative amortization of acquired intangibles" and "cumulative amortization tax shield components? I am trying to reorganzie the balance sheet to figure out invested capital and don't know how the textbook got these numbers. they use UPS's 10k statements from 2013, 2012, and 2011. I attached a picture for reference.

EXHIBIT 9.6 UPS and FedEx: Adjustments to Goodwill and Acquired Intangibles \$million Acquired intangibles Deferred tax liabilities, acquired intangibles 1 Goodwill and acquired intangibles, less tax gross Cumulative impairment of goodwill Cumulative amortization of acquired intangibles Cumulative amortization tax shield Cumulative amortization and impairment 1 Deferred tax adjustments are detailed in Exhibit 9.8. Intanglble Assets The following is a summary of intangible assets at December 31, 2013 and 2012 (in millions): Heightedfinite-lived or indefinite-lived intangible assets in 2012 or 2011. sponsorships and other factors. Intangible Assets The following is a summary of intangible assets at December 31,2012 and 2011 (in millions): Weightedsponsorships and other factors. EXHIBIT 9.6 UPS and FedEx: Adjustments to Goodwill and Acquired Intangibles \$million Acquired intangibles Deferred tax liabilities, acquired intangibles 1 Goodwill and acquired intangibles, less tax gross Cumulative impairment of goodwill Cumulative amortization of acquired intangibles Cumulative amortization tax shield Cumulative amortization and impairment 1 Deferred tax adjustments are detailed in Exhibit 9.8. Intanglble Assets The following is a summary of intangible assets at December 31, 2013 and 2012 (in millions): Heightedfinite-lived or indefinite-lived intangible assets in 2012 or 2011. sponsorships and other factors. Intangible Assets The following is a summary of intangible assets at December 31,2012 and 2011 (in millions): Weightedsponsorships and other factors