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: 10, 16, ['Q', '931', 'P', '6777', 'X', '3855', 'i', '1055', 'd', 'p', '7947', 'z', 'X', 'h', 'g', 'w', 'r', 'T']

SOLUTION: 7947

PROBLEM: 1, 2, ['1811', 'K', '3343', 'e']

SOLUTION: 1811

PROBLEM: 4, 25, ['G', 'd', '8221', '609', 'F', 'V', '4053', '6949', '3035', 'f', 'N', '7067', '3571', '8153', 'k', '3953', '6253', '5585', 'd', '41', 'o', '4905', '9267', 'v', 'H', '1003', 'H', '2819', '2153']

SOLUTION:
63441