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]: ['N', 'V', 't', 'X', 't', 'M']
[EX A]: 0

[EX Q]: ['1147', 'f']
[EX A]: 1147

[EX Q]: ['5109', '2237', 'd', 'S', '7085', 'i', '2155', '5021', '1695', '9205']
[EX A]:
32507