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: ['8147', '3191']

SOLUTION: 11338

PROBLEM: ['3107', 'D', '9595', '8807', 'Q', 'o', 'T', 'N', 'A']

SOLUTION: 21509

PROBLEM: ['v', '3385', 'R', '6095']

SOLUTION:
9480