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: ['P', '6161', 'k', '5925', 'h', 'G', 'n']

Output: 12086


Input: Consider Input: ['6585', '5263', '9497', '1117', 'a', 'F', 'w', '6595', '547']

Output: 29604


Input: Consider Input: ['a', 'y', '2911', '1897', 'X']


Output: 4808