Dollar Weighted Average Sumproduct Formula:

Good morning!

I've been trying to figure out a dollar weighted average formula in excel.

See attached file...

In sheet 1, I need to pull data from sheet 2 using a sumproduct formula to find the dollar weighted average maturity of a bond portfolio. Basically, I need to know how many days the portfolio has left to mature according to the portfolio's weighting by the amount in column H.

If anyone can point me in the right direction, I'd be much appreciative.

Thanks,
Mike