The original price of a pair of headphones is $39.99 before tax. When David bought the headphones they rang up for $31.99 before tax. He then paid 6% sales tax on the discounted price.
Part A: What is the percent discount on the headphones? Show all work and steps in your solution. (5 points)
Part B: What is the total amount that Dalton paid for the headphones including tax? Show all work and steps in your solution. (5 points)

To find the sales tax multiply the purchase price by the sales tax rate. Remember to convert the sales tax rate from a percent to a decimal number. Once the sales tax is calculated, it is added to the purchase price. The result is the total cost—this is what the customer pays.

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no solution.

none of these

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23 + 34 add up to 57 so just inform the teacher of this really stupid mistake