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:
['F', 'z', '1159', '345']
answer:
1504


question:
['4089', '2385', 'E', 'K', '259', '295', '6649', '8645', 'n', '2577', '2683', '9041', 'Q', 'm', '4237']
answer:
40860


question:
['7963', '153', '1981']
answer:

10097