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]: ['f', '6703', 'c', 'c', 'l', '2511', '6507', 'b', '9727', 'l', '1251', 'I', '5231', '91', 'L', 'M', 'd']
[EX A]: 32021

[EX Q]: ['W', '4453', '5895', 'Z', 'A', '7663', '2749', 'f', 'H', '6917', '1215', 'M', '1775', '5397', 'l', '8197', '5209', '8229', 'U']
[EX A]: 57699

[EX Q]: ['v', '1315', 'i', 'd', 'Q', 'U', 'P', '4389', 'h', 'h', '1731', 'c', 'm', 'U', 'J', 'D']
[EX A]:
7435