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.

[Q]: ['5499', '39', 'Q', 'b', 'W', '7155', '2515']
[A]: 15208


[Q]: ['1147', 'f']
[A]: 1147


[Q]: ['L', 'n', 'w', '8807', '2229', '2249', '7023', '907', 'v', '4327', '8477', 'v', 'W', '4305', 'p', '2699']
[A]:
41023