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]: ['s', '9377', '3663', '1375', 'j', 'L', '7943', '1711', '7409', '9115', '1227', 'I', 'U']
[EX A]: 41820

[EX Q]: ['4177', 'd', 'b', 'm', 'f', 'R', '797', '7905', '4355', '7515', '9801', 'F', 'R', '9125', '8445', 'k', 'K', 'K']
[EX A]: 52120

[EX Q]: ['2991', '43', 's', '8979', '6385', '8755', '2059', '1391', 'O', '7257', 'w', '5581', '5029', '9391', 'Q', 'j', 'I', 'S']
[EX A]:
57861