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: ['1203', '6179', '9835']

SOLUTION: 17217

PROBLEM: ['7465', 'G', '105', 'A', '3987', 'O', '7385', 'C', '8957']

SOLUTION: 27899

PROBLEM: ['1067', '1561', '8089', '1063', 'f', 'V', '1245', 'o', 'd', '4413', 'k', 'e', 'D', '4949', '6253']

SOLUTION:
28640