TASK DEFINITION: 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.
PROBLEM: ['Q', '6383', 'P', '8455', '3881', '5821', 'e', 'v', '1421', 'Q', '6377', '3157', '6407', 'q']

SOLUTION: 41902

PROBLEM: ['8147', '3191']

SOLUTION: 11338

PROBLEM: ['I', 'm', '6745', 'z', '2777', 'j', '9619', '7789', 'X', 'F', 'o', '1177', 'w', '9627', '891', 'Z', 'n', 'J', '9093', '6829']

SOLUTION:
54547