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: ['8743', 'Y', 'O', '8265', '1029', '5689', 'F', 'j', 'Z', 'i', 'S', '1285', '737']

Answer: 25748


Question: ['6941', 'I', 'j', '6135', '6525', '7853', '5607']

Answer: 33061


Question: ['9599', 'x', '4669', 'R', 'P', '9297', 'e', '9565', 'c', '5367', '893']

Answer:
39390