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]: ['Q', '8841', 'H', 'v', '2435', '8221', '807', 'P', '2247', 'M', '4609', '5657', 'k', '2807', 'j', '8451']
[EX A]: 44075

[EX Q]: ['r', '3537', 'T', '3611', 'k', '4983', 'h', '4317', '8727', 'E', '6471', '8465', 'f', '5429', 'T', '2169', '2171', 'P', '6941', 'D']
[EX A]: 56821

[EX Q]: ['e', 'd', '3533', '2021', '8901', 'w', 'Z', '1831', 'U', '8217', 'C', 'y', '5895']
[EX A]:
30398