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]: ['1395', '3605', '6001', 's', 'h', 'T', 'K', 'X', '9413', 'X', '5099', 'c', 'f', 't', 'S', 'f', '4651']
[EX A]: 30164

[EX Q]: ['B', 's']
[EX A]: 0

[EX Q]: ['O', 'o', '4257', '9261', '2733', 'a', '1811', 'f', '6715', '1205', '6561', '715', 'P', 'N', '9831', '1375', '4009', '9213']
[EX A]:
57686