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: ['5499', '39', 'Q', 'b', 'W', '7155', '2515']

Output: 15208


Input: Consider Input: ['901', 'X', 'W', 'D', 'm', 'M', '59', '4855', '6523', 'R', '9781', '8271', '4449', '2221', '8391']

Output: 45451


Input: Consider Input: ['445', '7681', 'P', 'Q', '667', 'y', 'z', '8477', 'X', '281', '779', '2335', '8455', '3013']


Output: 32133