My brain is so very tired and I need help please.....

I need to calculate what the end date will be, minus workdays and holidays:
A1 - start date - 1/1/2007
B1 - 60 (days) - 60
C1 - end date - ???

I've tried everything I've read from the hundreds of Excel Help sites I've visited. I'm so very frustrated and would really appreciate any help.

Thank you in advance!