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: 8, 26, ['n', '9063', 'c', 'k', '7515', 'm', '2261', '4297', '9817', '7599', '1669', 'l', '9837', '3021', 'Q', '3991', 'r', 'B', '8615', 'J', '5641', '7637', '469', '3571', '2265', '3969']

SOLUTION: 72398

PROBLEM: 4, 8, ['3753', 'y', '417', 'B', 'g', 'D', 'L', '6175']

SOLUTION: 6175

PROBLEM: 1, 6, ['f', '3861', '5839', 'S', 'V', '9511', '2165', '339', 'e', '5621', '9871', '1737', 'u', 'b']

SOLUTION:
19211