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.

Ex Input:
['D', 'C', '7295', 'g', 'j', '1387', 'O', '4701', 'B', 'd', 'W', 'b', 's', 'n', 'n', '4917', '2941', '1825', 'x']

Ex Output:
23066


Ex Input:
['N', 'V', 't', 'X', 't', 'M']

Ex Output:
0


Ex Input:
['7325', 'e', 'O', '659', '5843', '3893', '6649', 'G', '1959', 'X', '5133', '1743', 'S', 'V', '5237', '949']

Ex Output:

39390