Question

Omar and Kimmy have $22.00 each to spend at a book fair, where all students receive a 30% discount. They both want to purchase a copy of the same book, which normally sells for $28.50 plus 10% sales tax. To check if he has enough to purchase the book, Omar takes 30% of $28.50 and subtracts that amount from the normal price. He takes 10% of the discounted selling price and adds it back to find the purchase amount. Kimmy takes 70% of the normal purchase price and then computes 110% of the reduced price. Is Omar correct? Is Kimmy correct? Do they have enough money to purchase the book? Explain your answer using complete sentences and show your work.

Answer 1

Omar and Kimmy both calculated their purchase amounts correctly, but they don't have enough money to purchase the book.

Step-by-step explanation:

Omar and Kimmy both have $22.00 each to spend at the book fair. The book they want to buy normally sells for $28.50 plus 10% sales tax. Omar calculates his purchase amount by taking a 30% discount of $28.50 and subtracting it from the normal price.

He then adds 10% of the discounted selling price to find the purchase amount. Kimmy computes her purchase amount by taking 70% of the normal purchase price and then finding 110% of the reduced price. Both Omar and Kimmy's calculations are correct.

However, they will not have enough money to purchase the book, as the total cost of the book with tax exceeds $22.00.