Return Value Based On Results Of Conditional Formatting

I have a report that shows when our company has shipments covered by inventory (although you are not seeing the conditional formatting in the table). Columns K:Q represent shipment dates and shipment amounts. Columns D:I represent inventory with Column J being the total inventory. The conditional formatting works to highlight the cells in K:O of when shipments are covered by inventory. I need to be able to return the date (Columns K:Q) for an item (Column B) when a shipment is not covered by inventory.

For example Row 154: all shipments are covered by the amount of inventory. A shipment of 3 on 04/24 is more than covered the 105 pieces of inventory. But for Row 170, the shipment for 480 pieces on 04/23/12 does not have enough inventory to cover.

The result I need to return for row 170 is that 480 pieces are due on 04/23/12 that are not covered.

What formula would I used to return that value?

Excel 2010ABCDEFGHIJKLMNOPQ1LineITEMNEXT CUSTOMER PART WIP INVENTORYSTAGINGFINISHEDINSPECTDCYTRAILERTOTALPast4/18/20124/19/20124/20/20124/23/20124/24/20124/25/2012154Tabber105290325AA05290325AA-DC000010501053155Tabber1070025AC-EXP070025AC-

[Code]....