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.

['v', '3135', 'J', 'm', 'a']
3135

['6585', '5263', '9497', '1117', 'a', 'F', 'w', '6595', '547']
29604

['Y', '4975', 'N', 'P', 'B', 'c', '261', 'i', '3155', '1177', 'H', 'g', '9775']

19343