The price of a pair of headphones is $39.99 before tax. dalton bought the headphones for 30% off. he then paid 6% sales tax on the discounted price. part a: how much did dalton pay in sales tax? show all work and steps in your solution. (5 points) part b: what is the total amount that dalton paid for the headphones? show all work and steps in your solution. (5 points