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]: ['l', 'V']
[EX A]: 0

[EX Q]: ['339', 'h', 'd', '7449', 'e', 'u', '5055', '7029', '9009', 'G', 'U', '3', '441', '3273', 'K', '3827', '7069', 'x']
[EX A]: 43494

[EX Q]: ['2369', 'A', '3113', 'f', '1049', '4063', '4097', 'O', 'P', 'l']
[EX A]:
14691