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:
['457', '173', '6807', 'o', '555', 'l', 's', 'Z', 'm', '3035', '1283', '5645', 'S', '8641', 'J', 'Z', 'z', 'K']
answer:
26596


question:
['o', 'O', 'H', '7619', '6435', 'X', 'g', '1663']
answer:
15717


question:
['3007', 'V', '3889', 'k', 'R', 'i', '7089', '33', '2435', 'Y', 'n']
answer:

16453