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: ['y', 'p', '3553', '2155', 'b', 'R', 'j', 'V', 'U']

SOLUTION: 5708

PROBLEM: ['N', 'R', '6971', '7645', '4799', 'e', '5433', '3865', 'e', '6027', '6759', '173']

SOLUTION:
41672