Hello! Just by looking at the answer choices, the second and third choices are eliminated, because while you do get a 30% discount, you still have to pay 70% of the remaining price. You don't know the discounted price, so the first choice is also out. The best answer is the last one, because you find the discount price by multiplying 70% (0.7) by 2.40. The fourth choice is the correct answer.
