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: 16, 23, ['g', 'p', '7457', 'l', 'a', 'a', 'C', '6307', 'G', '5453', '1165', 'W', '6419', 's', '9445', 'y', 'Y', 'F', '9703', '4049', 'Y', '7173', 's', '7925', 'Z', '4413', 'd', '649']

SOLUTION: 20925

PROBLEM: 15, 20, ['o', '7647', 'E', '5963', 'Y', 'B', 'F', 'v', '9553', 'h', 'B', 'L', '8709', '5253', '9337', 'r', '6107', '3099', '8217', '7597', '9571', '5453', '8367']

SOLUTION: 34357

PROBLEM: 9, 16, ['7623', '2101', '5659', 'P', '3187', '8731', 'e', 'F', '8385', 'H', 'k', '2879', 's', '9811', '5083', 'P', '661', 'F', 'a', 'h']

SOLUTION:
26158