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:
['6563', 'R', 'M', 'B', 'b', 'E', '9911', '7327', 'J', '7389', 'w', 'b', 'c', '1527', 'K', 'r', '5441', '6823', '8455']
answer:
53436


question:
['k', 'a']
answer:
0


question:
['T', 'a', 'h', '3843', 'D', 'i', '5417', 'e', '8615', 'Z', '1257', 's', 's', 's', 'T', '7225', '9667', 'y', '1771', 'A']
answer:

37795