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:
['n', 'm', 'Y', 'v']
answer:
0


question:
['r', 'B', '8791', '3165', 'n', 'm']
answer:
11956


question:
['e', 'c', 'M', '269', 'k', 'w', 'H', '439', 'B', 'E', '8505', '2423', '4639']
answer:

16275