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: 4, 5, ['1427', '7597', '765', 't', '7057', 'f', 'B', 'k']

SOLUTION: 7057

PROBLEM: 1, 3, ['e', '1703', 'x', 'U', '873']

SOLUTION: 1703

PROBLEM: 7, 9, ['9379', '8419', 'p', 'K', 'O', 'c', 'c', 'T', 'H', 'I', 'U']

SOLUTION:
0