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: 6, 13, ['x', '8293', 'W', 'O', '511', 'y', '9801', '7925', '3353', 'J', 'D', 'J', 'B', '2559', 'j']

SOLUTION: 21079

PROBLEM: 3, 18, ['h', 'x', '371', 'i', '8545', '7767', '5033', '1041', 'A', '4643', 'L', '187', '5017', 'x', 'R', '7891', '3919', '9721', '8625', '5817', 'D', '4825', 'S']

SOLUTION: 54135

PROBLEM: 1, 2, ['8685', '6455', '5787', 'R', 'C', 'h', '4873']

SOLUTION:
15140