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]: ['8755', 'A', '2893', '6703']
[EX A]: 18351

[EX Q]: ['8739', 'K']
[EX A]: 8739

[EX Q]: ['1983', '5539', 'i', 'n', 'm', '8895', '6269', '5123', 'm', 'a']
[EX A]:
27809