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]: ['6921', 'a', 'U', '2821', '2111', 'h', '3937', '3697', 'd', '6309', 'q', '7961', '5287', '5375', '2721', '4523', 'V', '8633', 'c', '7643']
[A]: 67939


[Q]: ['3497', '761', '6157', 'J', 'n', '139', '9895', '2939', 'K', 'I', '2161', 'c', 'a', '485', '7959', 'i', '4753', '3305', 'G', '3475']
[A]: 45526


[Q]: ['8545', 'M', '9657', '9375', '4855', '2293', 'n', '2199', '9907', 'X', 't', 'B', '1263', '6007', 'F', '6331', 'O']
[A]:
60432