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: ['2469', 'c', '6931', 'a', '2167', '9493', '9403', '4123', '4949', 'R', 'V', 'h', '315', 'T', '9411', 'M', '1329', '8217', '6105', 'Y']

SOLUTION: 64912

PROBLEM: ['1123', '2765', '9395', '9695', '7963', '3813', '9987', 'y', 'N', 'F', '2757', 'o', 'r', '4827', '3523', 'G', 'j', '9785', 'C']

SOLUTION: 65633

PROBLEM: ['V', '2285', '3553', 's', 'i', '6875', '4041', '2789', 'X', 'I', '4887', '9011', '8651', '4087', 'X', '4507', '2649', 'e', '2647']

SOLUTION:
55982