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', '4645', '711', 'l', '5085', '8989', '2387', 'n', 'V', '1613', '4011', '3261', 'p', 'X', '349', 'e']

SOLUTION: 31051

PROBLEM: ['3469', 'n', '5561', '8597', '921', '4737', 'r', 'P', '7127', '3651', 'D', '1703', 'y']

SOLUTION: 35766

PROBLEM: ['a', 'J', 'S', 'c', 'c', 'a', '4303', '5713', '9217']

SOLUTION:
19233