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:
['s', 'g', 'Z', '8919', 'R']
answer:
8919


question:
['s', '3881', 'l', '5271', '9227', 'Z', '5429', '7691', '6127', '6301', '8533', 'T', '233', 'j', '1685', 'F', 'b', '3797', '6633', '7917']
answer:
72725


question:
['9677', '1697', 'f', '3343', '3361', '829', 'V', '1311']
answer:

20218