public decimal AddTotal(decimal pricePerTicket, int numTickets) { decimal total = pricePerTicket * numTickets; return total; }One example of using this function is to calculate the total cost of a group of movie tickets. For instance, if each ticket costs $10 and 4 tickets were purchased, the AddTotal function would return a value of 40. Package/library determination: There are multiple libraries that could potentially include a function like AddTotal, such as System, Math, and Linq. However, without additional context or information, it is difficult to determine exactly which package or library this function is associated with.