instruction:
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.
question:
['6121', 'S', '8683', 'Y', '6107', 'B', '6193', '5555', '365', '945', '1439', '7257', 'g']
answer:
42665


question:
['2787', '6085', '6989']
answer:
15861


question:
['l', 'i', 'V', '275', 'B', '1731', '5597']
answer:

7603