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: ['k', 'a']

Output: 0


Input: Consider Input: ['M', '5201', '2787', 'z', '9465', 'X', 'X', '4017', '8305', 'y', '6897', 'y', '6045', '9863', 's', 'd', '3611', 'l', 'd']

Output: 56191


Input: Consider Input: ['p', '7581', '2177', 'v']


Output: 9758