supplementary information on oil and gas producing activities ( unaudited ) c o n t i n u e d summary of changes in standardized measure of discounted future net cash flows relating to proved oil and gas reserves ( in millions ) 2006 2005 2004 sales and transfers of oil and gas produced , net of production , transportation and administrative costs $ ( 5312 ) $ ( 3754 ) $ ( 2689 ) net changes in prices and production , transportation and administrative costs related to future production ( 1342 ) 6648 771 .
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<i>(In millions)</i> 2006 2005 2004
Sales and transfers of oil and gas produced, net of production, transportation and administrative costs $(5,312) $(3,754) $(2,689)
Net changes in prices and production, transportation and administrative costs related to future production (1,342) 6,648 771
Extensions, discoveries and improved recovery, less related costs 1,290 700 1,349
Development costs incurred during the period 1,251 1,030 609
Changes in estimated future development costs (527) (552) (628)
Revisions of previous quantity estimates 1,319 820 948
Net changes in purchases and sales of minerals in place 30 4,557 33
Accretion of discount 1,882 1,124 757
Net change in income taxes (660) (6,694) (627)
Timing and other (14) 307 97
Net change for the year (2,083) 4,186 620
Beginning of year 10,601 6,415 5,795
End of year $8,518 $10,601 $6,415
Net change for the year from discontinued operations $(216) $162 $(152)
( in millions ) 2006 2005 2004
sales and transfers of oil and gas produced net of production transportation and administrative costs $ -5312 ( 5312 ) $ -3754 ( 3754 ) $ -2689 ( 2689 )
net changes in prices and production transportation and administrative costs related to future production -1342 ( 1342 ) 6648 771
extensions discoveries and improved recovery less related costs 1290 700 1349
development costs incurred during the period 1251 1030 609
changes in estimated future development costs -527 ( 527 ) -552 ( 552 ) -628 ( 628 )
revisions of previous quantity estimates 1319 820 948
net changes in purchases and sales of minerals in place 30 4557 33
accretion of discount 1882 1124 757
net change in income taxes -660 ( 660 ) -6694 ( 6694 ) -627 ( 627 )
timing and other -14 ( 14 ) 307 97
net change for the year -2083 ( 2083 ) 4186 620
beginning of year 10601 6415 5795
end of year $ 8518 $ 10601 $ 6415
net change for the year from discontinued operations $ -216 ( 216 ) $ 162 $ -152 ( 152 )
if the 2007 year shows the same rate of change as 2006 , what would the projected ending cash flow balance be , in millions?