Please help me with this question! Dinner at TGI Friday's costs $50 for your family. Find your total cost if the sales tax is 6% and you leave a 15% tip on the total bill. Round to the nearest cent if necessary. (Remember, some people tip on the cost of the meal, and some people tip on the total with tax. In this case, it is clear that we are tipping on the cost plus tax because it says "total bill." This means we need to treat it as a two-step problem.)