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: ['O', 'K', 's', 'V', '6815', 'c', '9277', 'V', '1783', 'b', 'i', '2045', 'E', 'E', '2035']

SOLUTION: 21955

PROBLEM: ['2039', '1679', '9675', 'S', 'J', '2069', 'r', 'e']

SOLUTION: 15462

PROBLEM: ['E', 'p', '4735', '9311', '9577', '407', 'y', 'Q', '1439', '9149', 'Q', '6041', '2119', '3359', '2823', 'i', '55', '5435', '6909']

SOLUTION:
61359