Write a method that returns the sum of all the numbers in array 'nums' but not including any numbers that match any values of the array 'excluded'. Both arrays can be any length, including length zero. Each number could be positive, negative, or zero. All numbers are included in the sum except those that also appears somewhere in the 'excluded' array. For example, if 'nums' is {5,7,3,1,10,2,7} and 'excluded' is {7,5,10}, the sum would be 3+1+10+2 which is 16. Look at the test data for more examples.