Conditional Formatting

 Hello Every one,

I have a question. For one of my clients the requirement is to change the color on the column based on Pick list values in the report. For that currently we are using Conditional Formatting. i.e

1. If the Picklist value is 'Recieved' then the data in one of the column should be Yellow. 

2. If the value is 'Recomended' then the color should be 'Green'.

3. If the 'Date Delivered'(a Custom date field) exceeds 5 business days then the associated cell with value ‘ Recomended’        automatically needs to turn Red.

Point #1 and #2 are working perfect but I am stuck with #3. Any idea how to make it automatically turn red based on Business days.