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: ['e', '9777', '1835', 'N', '2425', '1427', 'o', '4459', '9961', '3285', '5199', 'x', 'e', '7727']

SOLUTION: 46095

PROBLEM: ['c', 'E', 'M', '1303', 'y', 'H']

SOLUTION: 1303

PROBLEM: ['x', 'X', '9829', 'A', '8175', '9557', 'b', '8161', '9705', '6897']

SOLUTION:
52324