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:
['b', 'W', 'V', 'R', '3761', 'U', '4553', '1803', 'W', '7775', '1067', 'Y', 'D', '3159']
answer:
22118


question:
['Z', 'w', 'M', '2233', '5275', '5277', 's', '971', '7085', '6259', 'V', 'E', '4923', '7365', 'c', 'd', 'c', 'U', 'P']
answer:
39388


question:
['5023', '8439', '7847', '3553', 'B', 'm', 'z', '7713', 'i', '5787', '9493', 'P', '4603', 'U', '5885', 'l', '7181', '4303', 'v', '251']
answer:

70078