Using count function with dates in ddmmyy hhmm format

[Apel]

I have an order tracking sheet that has start times in column B, end times in column C and the processing time in column A. The start and end times are recorded in ddmmyy hhmm format (9/1/09 13:30). On another sheet I have dates listed for each workday. Next to these dates I am wanting a formula/macro that will traverse through column B and provide the number of orders and average processing time that match this. I also plan on recording the shortest and longest processing time next to these.