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.

[Q]: ['r', '3139', 'C', 'L', '7335', 'v', '9861', 'F']
[A]: 20335


[Q]: ['2417', '6671']
[A]: 9088


[Q]: ['1217', '3249', '145', '6073', 'W', '1195', 'P', '3775', '365', '6233', '3281', '5247', '8391', 'N', 'e', '6439', '8747', 'w', '1133']
[A]:
55490