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', 'O', '1309', 'm', '9333', '8283', 'Z', 'K', 'X', 'w', '9855', '9075', '2013', '8485', '9973', '8779']
67105

['w', '7301', '9411', 'z', 'g', 'X', '1045', 'l', 'F', 'M', 'R', '7957', 'e', '5145']
30859

['c', 'h', '9387', 'G', 'h', 't', '9847', 'T', 'f', 'z', '4777', 'V', 'R', 'A', '9485', 'r']

33496