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: ['3121', 'j']

SOLUTION: 3121

PROBLEM: ['m', 'e', 'W', 'N', '4459', '693', '3765', '2641']

SOLUTION: 11558

PROBLEM: ['8681', '7297', '817', 'c', 'X', 'F', 'h', 'W', '4045', 'd', 'A', '8677', 'l', '4231', '4671', 'E', 'P', 'm']

SOLUTION:
38419