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:
['2151', '7511']
answer:
9662


question:
['2469', 'c', '6931', 'a', '2167', '9493', '9403', '4123', '4949', 'R', 'V', 'h', '315', 'T', '9411', 'M', '1329', '8217', '6105', 'Y']
answer:
64912


question:
['s', 't', '7721', 'q', '7595', '3347', '5205', 'a', 'c', 'd', '6281', 'Y', 'm', 'w', 'U']
answer:

30149