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: ['9903', 'H', '757', 'J', '6481', '9789', 'H', '3285', 'V', 'X', '5229', '7197']

Output: 42641


Input: Consider Input: ['Q', '1767', '5523', 'I', '933', 'h', '2189', 'f', '7795', 'X', 'M', 'G', '1215', 'W', '8619']

Output: 28041


Input: Consider Input: ['8231', 'H', 'd', '8535', '8949', 'i', '525', '8275', '7557', '6187', '2469', '5347', 'K', '7655', 'B', '4817', 'O', 'A']


Output: 68547