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, 12, ['q', '8055', '5233', '5529', 'T', 'h', 'w', 'w', '9449', 'W', '7903', 'b', '6925']

SOLUTION: 17352

PROBLEM: 1, 4, ['1261', 't', 'h', '3615', '7919', 'k']

SOLUTION: 4876

PROBLEM: 1, 3, ['543', 'O', 'J', '6575', 'B', 't', '3675', 'F', '2101', 'p', '9345', 'K', 'x', 'y', '8607', 'F', 'D', 'R', 'Q', '6255']

SOLUTION:
543