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: ['d', '6851', 'o', '5521', 'l', '3911', 'w', '1005', 'e', '3323', 'r', '7311', '4377']

SOLUTION: 32299

PROBLEM: ['D', '1611', 'w', '8825', '8987', '3021', '9019', 's', '87', '9283', '5717', 'f', '1503', '6593', '8533', '785', 'g']

SOLUTION: 63964

PROBLEM: ['c', '9587', 'l', 'N', 'b', '2651', 't', '7731', '7295', '8965', '8313']

SOLUTION:
44542