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

['6941', 'I', 'j', '6135', '6525', '7853', '5607']
33061

['1141', 'J', '8995', '8391', 'z', 's', 'n', 'O', '3847', 'z', '2595', 'D', '9499', 'R', '1477', '369', 'J', 'r', '7607', 'w']

43921