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:
['u', 'e', 'P', 'D', '255', '2573', 'E', 'P', 's', '3725', '3391', 'I', '5323', '885']
answer:
16152


question:
['V', '3149', 'g', 'u', 'i', '9025', '8417', 'O', 'V', 'H', '959', '3077', 'R', '4727', 'Y', 'W', '9861', '8329', '963', '8141']
answer:

56648