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:
['9787', '1491', '4411', '5261', 'U', '9787', 'b']
answer:
30737


question:
['8683', 'p', '47', '8983', 'g', 'u']
answer:
17713


question:
['1771', '7567', '6695', '9865', '2291', '8685', 'f', '7195', '9793', 'W', 'm', '9663', 'M', '5107']
answer:

68632