We found an old email that provided details of the equipment and the total price including tax. This total price was $25,682.25 but it included PST (provincial sales tax) and GST (federal sales tax). And at that time (this "cascading" tax situation is fictional but cascading taxes are still used in some situations and countries) the GST was applied to the cost of the equipment, and then PST was applied to not just the cost of the equipment but the