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.

Q: ['v', 'a', 'O', 'S', 'r', 'T', 'r', 'K', 'K', '7781', '1749']

A: 9530
****
Q: ['2683', '4431']

A: 7114
****
Q: ['5579', '9573', '509', 'L', '8107', '2869', 'h', 'a', 'T', '1155', '367', 'N', '1443']

A:
29602
****