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:
['M', '9387', '7125', 'c', '1295', 'X', 'l', '9867']
answer:
27674


question:
['X', 'f', 'p', 'R', 'N']
answer:
0


question:
['4455', '125', 'X', '389', 'X', 'U', 'k', 'q', 'P', '3565', 'h']
answer:

8534