In this task, you are given an input list A. You need to find all the elements of the list that are numbers and calculate their sum.

['2039', '1679', '9675', 'S', 'J', '2069', 'r', 'e']
15462

['g', 'A', 'r', '539', '5459', '2725', '7447', '3693', '1757', 'r', 'W', '5949', '4569', '5153', '3985', 'Q', '505', 'M', '8989']
50770

['z', '3317', 'T', '7285', '9877', '9491', '181', '4605', 'P', 'H', 'H', 'Z']

34756