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.

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

['V', '8137', 'b', 'k', '2081', 'L', '9733', '7525', 'D', '2381', 'O']
29857

['2811', 'l', '6659', 'K', '8661', '4877', '5447', 'm', 't', 'D', '8999', '4723', 'o', '2683', 'R', 'i', 'n', 'l', 'b']

44860