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:
['3013', '3955', 'f', '1183', '5111', '9509', '2351', '7087', 'f']
answer:
32209


question:
['m', '2715', 'k', 'z']
answer:

2715