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: ['6849', 'I', 'p', 's', 'L', '4757', 'j', 'x', 'm', 'P', '5237', '1105', '9015', '9279', 'Q']

Output: 36242


Input: Consider Input: ['r', '3537', 'T', '3611', 'k', '4983', 'h', '4317', '8727', 'E', '6471', '8465', 'f', '5429', 'T', '2169', '2171', 'P', '6941', 'D']

Output: 56821


Input: Consider Input: ['1991', 'V', 'h', 'D', 'E', 'U', '2985', '2617', 'H', 'Q', '5535']


Output: 13128