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 Q]: ['3497', '761', '6157', 'J', 'n', '139', '9895', '2939', 'K', 'I', '2161', 'c', 'a', '485', '7959', 'i', '4753', '3305', 'G', '3475']
[EX A]: 45526

[EX Q]: ['1305', '1673', 'w']
[EX A]: 2978

[EX Q]: ['4241', '3497', 'o', 'a', 'K', '2495', 'v', 'R', '677', 'e', 'o', 'p', '5267', 'W', 'I', '1165', '2447', '3025', 'b']
[EX A]:
22814