Definition: 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: ['1931', 'u', '499', 'e', '6191', '7317', '6521', '2293', '8237', '6085', 'V', '8051', 'c', '2161', '3469']
Output:
52755