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: ['A', '9979', '8723', '1131', 'i', 'p', 'M']

SOLUTION: 19833

PROBLEM: ['n', 'm', 'Y', 'v']

SOLUTION: 0

PROBLEM: ['M', 'v', '3193', '285', 'i', '9241', 'O', '1813', '1133', 'C', '3035', '6189', 'd', 'd', 'D', '5055', '9709']

SOLUTION:
39653