Rina wants to buy a new school bag. She saves $3 each day from her allowance. After 12 days, she has enough money to buy the bag. However, the bag is on sale with a 25% discount. If the original price of the bag is $60, how much money does Rina have left after buying the bag?

Jawaban: $15

Rina saves $3 × 12 = $36. The discounted price is $60 - (25% of $60) = $60 - $15 = $45. She cannot afford the bag because she only has $36, so the question is flawed. Wait, but the problem says she has enough to buy the bag. Let's recalculate: Actually, if she saves $3 per day for 12 days, she has $36. The bag on sale costs $45. So she doesn't have enough. This means my initial assumption is wrong. Perhaps the discount is applied differently? The problem states: 'After 12 days, she has enough money to buy the bag.' So the amount she saved must be at least the sale price. So $3 × 12 = $36, whic