for marketing .
there are several methods that can be used to determine the estimated fair value of the ipr&d acquired in a business combination .
we utilized the 201cincome method , 201d which applies a probability weighting to the estimated future net cash fl ows that are derived from projected sales revenues and estimated costs .
these projec- tions are based on factors such as relevant market size , patent protection , historical pricing of similar products , and expected industry trends .
the estimated future net cash fl ows are then discounted to the present value using an appropriate discount rate .
this analysis is performed for each project independently .
in accordance with fin 4 , applicability of fasb statement no .
2 to business combinations accounted for by the purchase method , these acquired ipr&d intangible assets totaling $ 4.71 billion and $ 340.5 million in 2008 and 2007 , respectively , were expensed immediately subsequent to the acquisition because the products had no alternative future use .
the ongoing activities with respect to each of these products in development are not material to our research and development expenses .
in addition to the acquisitions of businesses , we also acquired several products in development .
the acquired ipr&d related to these products of $ 122.0 million and $ 405.1 million in 2008 and 2007 , respectively , was also writ- ten off by a charge to income immediately upon acquisition because the products had no alternative future use .
imclone acquisition on november 24 , 2008 , we acquired all of the outstanding shares of imclone systems inc .
( imclone ) , a biopharma- ceutical company focused on advancing oncology care , for a total purchase price of approximately $ 6.5 billion , which was fi nanced through borrowings .
this strategic combination will offer both targeted therapies and oncolytic agents along with a pipeline spanning all phases of clinical development .
the combination also expands our bio- technology capabilities .
the acquisition has been accounted for as a business combination under the purchase method of accounting , resulting in goodwill of $ 419.5 million .
no portion of this goodwill is expected to be deductible for tax purposes .
allocation of purchase price we are currently determining the fair values of a signifi cant portion of these net assets .
the purchase price has been preliminarily allocated based on an estimate of the fair value of assets acquired and liabilities assumed as of the date of acquisition .
the fi nal determination of these fair values will be completed as soon as possible but no later than one year from the acquisition date .
although the fi nal determination may result in asset and liability fair values that are different than the preliminary estimates of these amounts included herein , it is not expected that those differences will be material to our fi nancial results .
estimated fair value at november 24 , 2008 .

Cash and short-term investments
$982.9
Inventories
136.2
Developed product technology (Erbitux)<sup>1</sup>
1,057.9
Goodwill
419.5
Property and equipment
339.8
Debt assumed
(600.0)
Deferred taxes
(315.0)
Deferred income
(127.7)
Other assets and liabilities — net
(72.1)
Acquired in-process research and development
4,685.4
Total purchase price
$6,506.9

1this intangible asset will be amortized on a straight-line basis through 2023 in the u.s .
and 2018 in the rest of the world .
all of the estimated fair value of the acquired ipr&d is attributable to oncology-related products in develop- ment , including $ 1.33 billion to line extensions for erbitux .
a signifi cant portion ( 81 percent ) of the remaining value of acquired ipr&d is attributable to two compounds in phase iii clinical testing and one compound in phase ii clini- cal testing , all targeted to treat various forms of cancers .
the discount rate we used in valuing the acquired ipr&d projects was 13.5 percent , and the charge for acquired ipr&d of $ 4.69 billion recorded in the fourth quarter of 2008 , was not deductible for tax purposes .
pro forma financial information the following unaudited pro forma fi nancial information presents the combined results of our operations with .

Question: Analyse this data from a financial earnings document. what i the yearly amortization expense related to developed product technology?
Choices:
27.96667
0.03512
70.52667
15
0.70527
Correct choice index: 2