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: ['h', '6937', 'U', 'f', 'S', 'm', '9699', 'E', '4559', 'p', 'Z', 'o', '6409', 's', '4537', '5135', '6901', '6489', '5833', 'l']

Answer: 56499


Question: ['Q', '9787', '7533', '9489', 'C', '1753', '5121', '1405', '9267', '4815', 's', '5887']

Answer: 55057


Question: ['o', 'V', '8119', '3557', 'B', 'C', '1343', 'c', '9165', 'z', 'b', '4155', '6485', 'K', '1321', 'g', 'U', '4397', 'W']

Answer:
38542