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]: ['1969', 'm', 'Y', 'N', '7331', 'J', 'b', '2485', 'x']
[EX A]: 11785

[EX Q]: ['2775', '7405', 'F', 'D', '9025', '827', 'e', 'j', 's', 'e', 'Q', '1137', 'G']
[EX A]: 21169

[EX Q]: ['191', 'r', 'K', 'a']
[EX A]:
191