Write a VBA Excel program that allows the user to input the total number of items that are possible, and how many items from them that are to be selected and outputs the total number of possible combinations.

The following formula gives the number of different combinations we can get by choosing k items out of a total of n items: n! combinations For example, if we want to figure out the total number of different three-ice cream flavors we could buy by choosing three flavors out of a total of 15, we would use the following equation: 15! of three ice cream flavors 3! 12! Write a VBA program that allows the user to input the total number of items that are possible, and how many items from them that are to be selected and outputs the total number of possible combinations. Note that there is no function in VBA to calculate a factorial- you will have to write code for that