Add the code that makes this work. If you're new to programming, this may challenge you. $($Hint: To find the smallest invoice total, use the Math.Min$()$ method to compare each invoice total to a variable that contains the smallest invoice total to that point. Then, replace the variable value with the smaller of the two invoice totals. To make this work for the first invoice, you can initialize this variable to a large number like the MaxValue member of the Decimal class.$)$