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: ['5573', '6221', 'C', '8649', '6603', 'q', '9403']

Output: 36449


Input: Consider Input: ['A', '6323', 'T', 'H', 'M', 'S', 'D', 'r', 'v', '8169', '7649', '5149', 'x', '6275']

Output: 33565


Input: Consider Input: ['k', 'g', '3273', 'A', 'r', 'r', 'I', '6171', 'k', 's', 'q', 'w', '7939', '2867', '5715', 'h', 'x', 's']


Output: 25965