TASK DEFINITION: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to return the sum of all the numerical elements in the list A between the positions i and j (including positions i and j). Return 0 if no numerical element is present in the list between the given ranges. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
PROBLEM: 1, 3, ['x', '971', '3029']

SOLUTION: 4000

PROBLEM: 3, 4, ['u', '5041', 'E', 'U', 'a', 'd']

SOLUTION: 0

PROBLEM: 1, 8, ['9411', 'H', '9473', '4687', 'S', 'k', 'P', '77', 't', 'R', '2207', '9095']

SOLUTION:
23648