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: ['83', 'k', 'p', 'o', 'b', '7819', '2089', '4141', 'c', 's', '6045', '6783', 'J', 'B', 'x', 'O', 'X', '9693']

SOLUTION: 36653

PROBLEM: ['w', 'I', 't', '813', 'K', '5785']

SOLUTION: 6598

PROBLEM: ['c', '5473', 'e', '9317', 'V', '6635', 'p', 'G', '6903', '4421', '1291', '1093', 'r']

SOLUTION:
35133