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]: ['9401', 'w', 'b', '8287', 'n', 'O', 'H', 'h', '45', '2337']
[EX A]: 20070

[EX Q]: ['R', 'I', 'f', 'K', 'p', '8579', 'e', '1223', 'I', 'K', '8311', '2147', '4241', 'z', '6671', 'r']
[EX A]: 31172

[EX Q]: ['q', '4741', '3943', 'm', '7203', '5031', 'H', '4639', 'r', 'j', 'Y', '9055', 'M', '7555', '4833', '655', '2121', 'l', 's', 'X']
[EX A]:
49776