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', '6989', 'I', 'w', '3591', '3067', '3883', 'C', '6049', '5723', 'j', '5989', 'C', 'R', '475', '7779', '671']
answer:
44216


question:
['7459', '491', '7823', '6965', 'H', '109', 'R', 't', '3959', '2821', 'R', '2807', 'o', 'v', '1305', 'a', '1411', 'r', '3669']
answer:
38819


question:
['m', '3887', '9641', '4857', 'm', 'T', '5919', 'f', '8409', 'C', '9551', 's', '4565', '711', 'A', 'e']
answer:

47540