Molly wants to buy a dress that cost costs $20. She has a coupon for 40% off, and there is a 10% sales tax. How much will she pay all together? Answer the questions to find out. 1. What is 40% off of $20? Show work 2.After using a coupon, what is the sale price of the dress? 3. How much is the 10% tax on the sale price? Explain how you found the answer 4. After tax is added to the sale price, hos much does Molly pay for the dress?