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]: ['1671', 'H', '9271']
[EX A]: 10942

[EX Q]: ['L', 'i', '9225', 'w', '5365', '8077', '2733', 'W', '8493', 'B']
[EX A]: 33893

[EX Q]: ['p', 'T', 'B', '7443', '3439', '6789', 'h', '3931', 's', 'h', '863', 'I', 'x', 'r', 'b', '5057', '5969', '7353', 'y']
[EX A]:
40844