Final answer:
The final price Karin will pay for her chemistry lab equipment and chemicals, after applying a 5% discount and then adding a 5% sales tax, is $384.04.
Step-by-step explanation:
To calculate the final price Karin will pay for her chemistry lab equipment and chemicals, we will first calculate the total cost before discount, then apply the 5% discount to get the discounted price, and lastly, add the 5% sales tax to the discounted price. The total cost before discount is the sum of the prices of the chemistry set and the starter chemical solutions.
Total Cost = Chemistry Set + Chemical Solutions
= $250.00 + $135.00
= $385.00
Next, we apply the 5% discount.
Discount Amount = Total Cost × Discount Rate
= $385.00 × 5/100
= $19.25
Discounted Price = Total Cost - Discount Amount
= $385.00 - $19.25
= $365.75
Finally, we apply the 5% sales tax to the discounted price to find the final price.
Sales Tax = Discounted Price × Tax Rate
= $365.75 × 5/100
= $18.2875
Final Price = Discounted Price + Sales Tax
= $365.75 + $18.2875
= $384.0375
To round to the nearest cent, the final price that Karin will pay is $384.04.