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: ['L', 'i', '9225', 'w', '5365', '8077', '2733', 'W', '8493', 'B']

SOLUTION: 33893

PROBLEM: ['Q', '8841', 'H', 'v', '2435', '8221', '807', 'P', '2247', 'M', '4609', '5657', 'k', '2807', 'j', '8451']

SOLUTION: 44075

PROBLEM: ['e', 'U', 'F', '363', '3815', '4161', '8275', 'h', '2437', 'e', 'A', '3441', '4403', '3271', '4781', 'B', '6387', 'k']

SOLUTION:
41334