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

Answer: 36449


Question: ['2787', 'z', '9351', '3339']

Answer: 15477


Question: ['Y', '5625', 't', 'E', '5265', 'W']

Answer:
10890