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.

['R', '3361', 'c', 'S', 'g', '3829', '7347', '6633', 'e', '9227']
30397

['E', 'X', 'C', 'v', '2803', 'g', 'b', '763']
3566

['k', 'g', 'F', 'K', '8221', '7385', '8791', 'A', 'w', '6391', '77', 'W', 't', '4979', '2779', 'm', '9399', '9009', 'b']

57031