I'm trying to subtotal data by calendar week with duplicate and
non-consecutive dates - please help? Column A represents an invoice date,
Column B represents the qty shipped. I need the total qty shipped per week?

Date QTY
1/4/06 864
1/4/06 192
1/5/06 144
1/5/06 192
1/5/06 48
1/5/06 528
1/6/06 48
1/9/06 384
1/9/06 240
1/10/06 1,008.00
1/10/06 480
1/10/06 768
1/10/06 720
1/10/06 240

Thanks!