There are given data
Under column A, there is a date.
Under column B, there is a score
Under column C, there is a date.
Under column D, there is a score

24-Dec-07 13% 28-Dec-07 31% [row 1]
31-Dec-07 66% 29-Dec-07 48% [row 2]
07-Jan-08 78% 30-Dec-07 15% [row 3]
14-Jan-08 47% 31-Dec-07 96% [row 4]
21-Jan-08 100% 01-Jan-08 33% [row 5]
28-Jan-08 61% 02-Jan-08 62% [row 6]
04-Feb-08 97% 03-Jan-08 65% [row 7]

I would like to retrieve the score under column B into cell E1, where the
date in cell C1 is equal and between the periods in column A, such as 13%
should be return in cell E1, another example, 66% should be returned in cell
E5, because the date in cell C5 is 01-Jan-08, which is between 31-Dec-07 and
07-Jan-08. Through this process, I would like to determine all score under
column E.
Does anyone have any suggestions?
Thanks in advance for any suggestions
Eric