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: 21, 27, ['2789', '3875', '2351', 'Y', '1127', 'J', 'Z', '5187', 'c', '8115', '3459', 'Y', 'f', 'o', 'L', 'H', '2931', '879', 'L', 'e', '3745', '173', 'v', 'W', '9393', 'Y', '7651']

SOLUTION: 20962

PROBLEM: 10, 22, ['4049', '2745', 'g', 'T', 'N', 'u', 'Q', '3687', '5871', 'i', '9139', '585', '8435', '5761', '5825', '5909', 'f', '6317', '8227', '4051', 'E', '5167', '6953', 'g', '4113', '2493']

SOLUTION: 59416

PROBLEM: 9, 12, ['F', '103', 'i', '3797', 'X', '1739', 'g', '7967', 'U', 'N', '3125', 's']

SOLUTION:
3125