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: ['61', '5695', 'u', '253', 'n', '1035', 'd', '3017']

Output: 10061


Input: Consider Input: ['3331', '5791', 'r', 'Q', '2243', '8229']

Output: 19594


Input: Consider Input: ['5481', 'R', 'L', 'V', '4429', 'E', '1247', 'z']


Output: 11157


