Need faster/shorter formula
 

Is there a way to add the numbers in row 2 that have the same date so that if
the result is Equal to, OR, minus 1 to 3 before, OR, plus 1 to 3 over (say
30), then diplay the result, otherwise display nothing?
Formula needs to be in row 3 and if the date are different, as in B1, then
the calculation would start over with the new date in the next column.
Desired results are shown in row 3
My attempts have resulted in formula that is too long.
A B C D
1 Date 8/29/02 11/6/05 11/6/05
2 Draft 16 20 7
3 New 16 27

Thank you
Luke