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: ['J', 'm', '1255', 'S']

Answer: 1255


Question: ['m', '983']

Answer:
983