Please answer the given financial question based on the context.
Context: have access to liquidity by issuing bonds to public or private investors based on our assessment of the current condition of the credit markets . at december 31 , 2009 , we had a working capital surplus of approximately $ 1.0 billion , which reflects our decision to maintain additional cash reserves to enhance liquidity in response to difficult economic conditions . at december 31 , 2008 , we had a working capital deficit of approximately $ 100 million . historically , we have had a working capital deficit , which is common in our industry and does not indicate a lack of liquidity . we maintain adequate resources and , when necessary , have access to capital to meet any daily and short-term cash requirements , and we have sufficient financial capacity to satisfy our current liabilities . cash flows millions of dollars 2009 2008 2007 .
|millions of dollars|2009|2008|2007|
|cash provided by operating activities|$ 3234|$ 4070|$ 3277|
|cash used in investing activities|-2175 ( 2175 )|-2764 ( 2764 )|-2426 ( 2426 )|
|cash used in financing activities|-458 ( 458 )|-935 ( 935 )|-800 ( 800 )|
|net change in cash and cash equivalents|$ 601|$ 371|$ 51|
operating activities lower net income in 2009 , a reduction of $ 184 million in the outstanding balance of our accounts receivable securitization program , higher pension contributions of $ 72 million , and changes to working capital combined to decrease cash provided by operating activities compared to 2008 . higher net income and changes in working capital combined to increase cash provided by operating activities in 2008 compared to 2007 . in addition , accelerated tax deductions enacted in 2008 on certain new operating assets resulted in lower income tax payments in 2008 versus 2007 . voluntary pension contributions in 2008 totaling $ 200 million and other pension contributions of $ 8 million partially offset the year-over-year increase versus 2007 . investing activities lower capital investments and higher proceeds from asset sales drove the decrease in cash used in investing activities in 2009 versus 2008 . increased capital investments and lower proceeds from asset sales drove the increase in cash used in investing activities in 2008 compared to 2007. .
Question: what was the net working capital surplus for 2008 and 2009 , in millions?


Answer: The answer is:900.0