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]: ['D', 'P', '9951', '2897', 'V', 'C', 'B', 'H', 'c', 'h', '2843', 'a']
[EX A]: 15691

[EX Q]: ['o', 'a', 'K', '6031']
[EX A]: 6031

[EX Q]: ['2287', 'J', '6031', 'v', '373', '2805', 'g', 'K', '2843', '8915', 'u', 'b', 'm', '2545', '4635', '749', 'w', 'O', 's', '1157']
[EX A]:
32340