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.

Input: Consider Input: ['3107', 'D', '9595', '8807', 'Q', 'o', 'T', 'N', 'A']

Output: 21509


Input: Consider Input: ['B', 's']

Output: 0


Input: Consider Input: ['F', '2225', '1467', 'G', '651', 'f', 'F', 'z', 'P', '6207', 'V', 'e', '2579', '8611']


Output: 21740