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: ['E', 'X', 'C', 'v', '2803', 'g', 'b', '763']

Answer: 3566


Question: ['x', 'V', 'g', '5469', 'c', '7873', 'T', 'p', '8109', '5395', 'h', 'z', 'T', '9373']

Answer: 36219


Question: ['a', '9555', 'G', '7819']

Answer:
17374