Cracked cowl!!!!!!!

I have a 69 cuda. I just noticed two cracks coming from under the bottom of my windshield. They are about 1.5 inches apart and 1.5 inches long and about 4 inches inboard of my passenger side A-pillar.
my questions are:
1) is this a common problem with A-bodies.
2) Is this a major ( meaning costly ) fix to repair.
Any help on this subject would be appreciated.


TIA