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', '5201', '2787', 'z', '9465', 'X', 'X', '4017', '8305', 'y', '6897', 'y', '6045', '9863', 's', 'd', '3611', 'l', 'd']
answer:
56191


question:
['B', 'u', '9227', 'b', '8767']
answer:
17994


question:
['o', 'c', 'D', '735', 'v', '7457', 'B', '9947', '3291', '9945', '3473', 'w', 'y', 'C', 'i', '5427', '611', '4567', 'N', '4645']
answer:

50098