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: ['9125', '1443', '2303', 'O', '8463', '401', '3983', 'g', '4327', 'z', 'n', 'F', 'Q', 'j', '9885']

Answer: 39930


Question: ['3051', '5343', 'k', 'k', '6815', 'E', '4745', 'A', 'A', '1251', '6649', 'f', '4133', 'X']

Answer: 31987


Question: ['m', 's', 'l', '9403', 'i', 'z', 't', 'B', '3469', '7355', '8583', 'Z', 'K', 'Y', 'k']

Answer:
28810