Allison spent a total of 16.20 for lunch at burrito de lite, including tax and tip. She paid 8 percent sales tax on her purchase and then left the waiter a tip equivalent to 20 percent of her total bi

Allison spent a total of 16.20 for lunch at burrito de lite, including tax and tip. She paid 8 percent sales tax on her purchase and then left the waiter a tip equivalent to 20 percent of her total bill including tax. What was the cost of Allison's meal, before tax and the tip?