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 Input:
['1965', '8127', 'x', '4981', '8077', 'O', '467', '701', 'V', 'm', 'y', '5989', '123', 't', '4019', 'j', '1827', '8799']

Ex Output:
45075


Ex Input:
['2787', '6085', '6989']

Ex Output:
15861


Ex Input:
['6767', '6203', 'T', '565', '8847', 'l', '6057', '2683', 'T', 'u', 'Q']

Ex Output:

31122