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:
['A', '9979', '8723', '1131', 'i', 'p', 'M']
answer:
19833


question:
['6645', 'k', '4879', 'N', '113', 'L', 'x', '8365', 'v', 'A']
answer:
20002


question:
['W', '4683', '1253', '1751', '4957', '5417', '7577', 'e', 'J', '1667', '955', 'b', '3239', 'w', 'a', '69', 'I', '4391']
answer:

35959