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: 15, 21, ['w', 'R', '9247', '5745', '5397', 'U', 'R', 'e', '8067', 'e', '2851', 'O', 'F', '4705', '5393', 'q', 'b', 'J', '211', '4319', 'o', 'h', 'Z', '4423', 'j', '2691', 'U']

SOLUTION: 9923

PROBLEM: 4, 4, ['Y', 'X', 'r', '439', 'D', 'H', '1903']

SOLUTION: 439

PROBLEM: 5, 6, ['3087', '7917', 'M', '4557', '4409', 'N', '1843', 's', '1883', 'L', '315', '9983', 'n', 'H', 't', '4419']

SOLUTION:
4409