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]: ['1815', 'U', '869', 's', '1847', 'C', '2711', 'S', 'i', '7949', '4477', '5093', 'D', '8661', '3835', '4087', '73', 'V', '3149', 's']
[EX A]: 44566

[EX Q]: ['8529', '2657', '1599', 'b', '8187', '7005', '7481']
[EX A]: 35458

[EX Q]: ['I', 'i']
[EX A]:
0