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: ['M', '5201', '2787', 'z', '9465', 'X', 'X', '4017', '8305', 'y', '6897', 'y', '6045', '9863', 's', 'd', '3611', 'l', 'd']

SOLUTION: 56191

PROBLEM: ['9401', 'w', 'b', '8287', 'n', 'O', 'H', 'h', '45', '2337']

SOLUTION: 20070

PROBLEM: ['n', 'H', 'M', '3925', '2459', '1475', 'G', '5137', '6895', '8823', '6483']

SOLUTION:
35197