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.

[EX Q]: ['3121', 'j']
[EX A]: 3121

[EX Q]: ['V', 'O', '1309', 'm', '9333', '8283', 'Z', 'K', 'X', 'w', '9855', '9075', '2013', '8485', '9973', '8779']
[EX A]: 67105

[EX Q]: ['d', '2865', 'o', '7615', '5751', '7045']
[EX A]:
23276