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.

['V', '2633', '3269', 'r', 'Q', '3517', '2571', 'G', '4105', 'm', 'z', 'B', 'A']
16095

['X', 'f', 'p', 'R', 'N']
0

['W', '3045', 'g']

3045