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', '9387', '7125', 'c', '1295', 'X', 'l', '9867']
answer:
27674


question:
['z', '3199', 'r', '849', 'C', 'v', '1931', 'M', 'Q', '4531', '579', 'x', '8997', '4663']
answer:
24749


question:
['7851', '4631', 'l', '8733', '4189', 'P', 's', 'I', '6705', '3811', '9751', '1581']
answer:

47252