Program Overview: Create a program that calculates the cost of hosting Halloween parties on Friday, Saturday, and Sunday. The program will read as input the number of guests attending, the average number of slices of pumpkin pie each person consumes, and the price of one whole pie. The output should display the costs in a monetary format, showing two decimal places. This can be achieved by using cout $<<$ fixed $<<$ setprecision$(2)$; prior to any output involving monetary amounts.