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: ['t', 'v', 'B', 'Y']

SOLUTION: 0

PROBLEM: ['z', 'j', 'M', 'E', '1689', '8413', '2603', 'b', '5101', 'w', 'r']

SOLUTION: 17806

PROBLEM: ['y', '8359', '6591', 'o', 'd', 'A', 'o', 'E', 'L', '4503', 'k', '4191', 'q', 'i', 'e']

SOLUTION:
23644