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: ['G', 'Z', '4819', '9763', '9987']

Output: 24569


Input: Consider Input: ['1395', '3605', '6001', 's', 'h', 'T', 'K', 'X', '9413', 'X', '5099', 'c', 'f', 't', 'S', 'f', '4651']

Output: 30164


Input: Consider Input: ['217', 'U', 'm', 'k', '863', '6291', 't', 'D', '4643', '1271', 'V', 'Z', '9745', '3003', 'u', 'P', 'L']


Output: 26033