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: ['A', '9775', '5867', 'n', '1329', '5973']

Output: 22944


Input: Consider Input: ['8109', '6811', 'f', 'l', '5869', 'm', '4657', 'y', 'P', '7983', 'o', 's', 'i', 'm', '2141', '4497']

Output: 40067


Input: Consider Input: ['Z', 'L', '455', '9855', 'O']


Output: 10310