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:
['7293', '2619', '2459', '3829', 'J', 'c', 'a', 'a', '311', 'x', 'r', '6123', '2847', '4809']
answer:
30290


question:
['O', 'j', 'Z', 'u', '7427', '4225', '3139', '9993', '9945', '3639', 'h', 'j', 'f', '6511', 'e', '4607', '2741', '4743']
answer:
56970


question:
['565', 'N', 'H', 'B', 'm', '6389', 't', '367', 'F', 'o', 'r', '315', 'q']
answer:

7636