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: ['3451', '2325', '2511', 'i', '6159', '2291', 'e', 'l', 'P', '1177', 'o', 'T']

Output: 17914


Input: Consider Input: ['I', 'l', '4671', 'f', 'w', '4255', '8259']


Output: 17185