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: ['M', '6989', 'I', 'w', '3591', '3067', '3883', 'C', '6049', '5723', 'j', '5989', 'C', 'R', '475', '7779', '671']

Output: 44216


Input: Consider Input: ['D', 'b', 'h', 'p', '1637']

Output: 1637


Input: Consider Input: ['E', '9277', 'p', '45', '9343', '203', '4979', 'w', '7949', '9803', 'Y', '2693', 'I', '8343', '495', 'W', '6749', 'M']


Output: 59879