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: ['4463', '489']

SOLUTION: 4952

PROBLEM: ['7361', '6913', '3605', '2081', '7619']

SOLUTION: 27579

PROBLEM: ['c', 'r']

SOLUTION:
0