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: ['t', 'v', 'B', 'Y']

Answer: 0


Question: ['t', 'Q', '5189', 'g', 'c', '4685', '5309', 'W', '6729', '2843']

Answer: 24755


Question: ['8549', '1047', '7765', 'x', '3609', '3209', 'g', '635', '787', 'e', '9679', '2877', 'W']

Answer:
38157