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: ['P', '6161', 'k', '5925', 'h', 'G', 'n']

Output: 12086


Input: Consider Input: ['6551', 'm', '3941', 'F', 'K', 'u', '7981', '9581', 'X', 'M', 'N', 'e', 'G', 'i']

Output: 28054


Input: Consider Input: ['l', 'p', 'B', '5995', 'v', 'F', '8023', 'r', 'r', 'f', '7633', '991', '7253', 'N']


Output: 29895