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.

Input: Consider Input: ['D', '1693', 'f', 'B', 'o', '3947', '8667', 'f', '6721', '4191', '79']

Output: 25298


Input: Consider Input: ['3121', 'j']

Output: 3121


Input: Consider Input: ['7393', '6107', 'f', '5429', '1329', '9331', 'D', '6139', 't', 't', '2401', '665', 's']


Output: 38794