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

[EX Q]: ['4401', 'p', 'V', 'l', 'H', '7329', 's', '4717', 'l', '1773', '67', '179', 'l', '6991', 'a', '9377']
[EX A]: 34834

[EX Q]: ['3959', 'k', 'b', 'W', 'j', 'N', 'W', '2743', 'g', '6585', '9305', 'W', '4541']
[EX A]:
27133