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]: ['B', '9189', '3691', '2869', '1525', 'd', 'H', 'P', '8613', 'b', 'r', '5289', 'V', '6433', '8733', 'K', '8105', '1041', 'U', 'L']
[A]: 55488


[Q]: ['M', 'H', 'l', 'Y', '3811', '1953', '5869', 'U']
[A]: 11633


[Q]: ['B', 'u', '9227', 'b', '8767']
[A]:
17994