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: ['339', 'h', 'd', '7449', 'e', 'u', '5055', '7029', '9009', 'G', 'U', '3', '441', '3273', 'K', '3827', '7069', 'x']

Output: 43494


Input: Consider Input: ['A', 'S', 'c', 'I', 'M', 'P', '8739', '879', '1401', '3941', '4061', 'q', 'P', '2805', '4473']

Output: 26299


Input: Consider Input: ['1979', '8605', '5675', '6667', 'j', 'A', 'a', 'Q', 'c', '7247', '9267', '2769', 'U', 'N', 'S', 'L']


Output: 42209