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:
['c', 'E', 'M', '1303', 'y', 'H']
answer:
1303


question:
['4271', 'N', 'M', '5239', '7037', 'x', 'U', 's', '7107', '4163', 'f', '3607', '6155']
answer:
37579


question:
['x', '2149', 'n', '5821', '8745', '4333', 'g', 'P', 'Q', '7235', 'i', 'R', 'h']
answer:

28283