Compute the total elapsed working time

I have searched high and low for a formula that would compute the total elapsed working time (in minutes) of an event taking into consideration only the working days and specified working hours. I finally broke down and wrote one myself. Here it is ... enjoy!

Named Ranges:

• DayStart - time of day business starts
  DayEnd - time of day business ends
  HolidayList - vector of holiday dates
  StartEvent - the date/time of the start of the event
  EndEvent - the date/time of the end of the event

Formula:

Formula:

=(IF((INT(StartEvent)=INT(EndEvent)),IF(StartEvent-INT(StartEvent)<DayEnd,(MIN(EndEvent-INT(EndEvent),DayEnd)-MAX(StartEvent-INT(StartEvent),DayStart)),0),IF(StartEvent-INT(StartEvent)<DayEnd,DayEnd-(StartEvent-INT(StartEvent)),0))*NETWORKDAYS(StartEvent,StartEvent,HolidayList)+(IF(NETWORKDAYS(StartEvent,EndEvent,HolidayList)>2,(NETWORKDAYS(StartEvent,EndEvent,HolidayList)-2)*(DayEnd-DayStart)))+IF(INT(EndEvent)>INT(StartEvent),IF(AND(EndEvent-INT(EndEvent)>DayStart,NETWORKDAYS(EndEvent,EndEvent,HolidayList)=1),(MIN(EndEvent-INT(EndEvent),DayEnd)-DayStart),0),0))*60*24

How it works?
Although it appears a little complicated, it basically is:
The number of minutes in the first day of the event (as long as it is a working day)
PLUS
The number of minutes of the last day of the event (also provided it is a working day)
PLUS
Number working days between the first day and last day * working minutes in a day