future minimum lease commitments for office premises and equipment under non-cancelable leases , along with minimum sublease rental income to be received under non-cancelable subleases , are as follows : period rent obligations sublease rental income net rent .

Period
Rent Obligations
Sublease Rental Income
Net Rent
2008
$323.9
$(40.9)
$283.0
2009
300.9
(37.5)
263.4
2010
267.7
(31.0)
236.7
2011
233.7
(25.7)
208.0
2012
197.9
(20.2)
177.7
2013 and thereafter
871.0
(33.1)
837.9
Total
$2,195.1
$(188.4)
$2,006.7

guarantees we have certain contingent obligations under guarantees of certain of our subsidiaries ( 201cparent company guarantees 201d ) relating principally to credit facilities , guarantees of certain media payables and operating leases .
the amount of such parent company guarantees was $ 327.1 and $ 327.9 as of december 31 , 2007 and 2006 , respectively .
in the event of non-payment by the applicable subsidiary of the obligations covered by a guarantee , we would be obligated to pay the amounts covered by that guarantee .
as of december 31 , 2007 , there are no material assets pledged as security for such parent company guarantees .
contingent acquisition obligations we have structured certain acquisitions with additional contingent purchase price obligations in order to reduce the potential risk associated with negative future performance of the acquired entity .
in addition , we have entered into agreements that may require us to purchase additional equity interests in certain consolidated and unconsolidated subsidiaries .
the amounts relating to these transactions are based on estimates of the future financial performance of the acquired entity , the timing of the exercise of these rights , changes in foreign currency exchange rates and other factors .
we have not recorded a liability for these items since the definitive amounts payable are not determinable or distributable .
when the contingent acquisition obligations have been met and consideration is determinable and distributable , we record the fair value of this consideration as an additional cost of the acquired entity .
however , we recognize deferred payments and purchases of additional interests after the effective date of purchase that are contingent upon the future employment of owners as compensation expense .
compensation expense is determined based on the terms and conditions of the respective acquisition agreements and employment terms of the former owners of the acquired businesses .
this future expense will not be allocated to the assets and liabilities acquired and is amortized over the required employment terms of the former owners .
the following table details the estimated liability with respect to our contingent acquisition obligations and the estimated amount that would be paid under the options , in the event of exercise at the earliest exercise date .
all payments are contingent upon achieving projected operating performance targets and satisfying other notes to consolidated financial statements 2014 ( continued ) ( amounts in millions , except per share amounts ) .

Question: Analyse this data from a financial earnings document. what is the mathematical range for the range of rent obligations from 2008-2012?
Choices:
521.8
126.0
-20.2
-126
115.9
Correct choice index: 1