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', '1589', '8353', 'X', 'P', '3173', 'V', '1335', 'm', 'l', '6421', '4823', 'r', '8941', '4255', '9107', 'z', '2449', '2321', 'l']
answer:
52767


question:
['x', '5259', 'T', 'L', 'C', 'H', '2493', 'u', '3851', '2439', 'U']
answer:
14042


question:
['N', '1303', 'g', '3851', '3879', 'p', 'P', '3685', 'A', 'i', 'c', 'X', '7113', 'e', 'u', 'V', 'z', '4943', 'F', 'm']
answer:

24774