Let's pretend the base price is $100
If the shopper brings enough money to cover 25% of the base price then they are bringing $25
The bargain promises 25% off of the base price of $100, meaning that the bargain price will be $75
The shopper cannot purchase the item because they only brought $25 when they should have brought $75
Before I answer the question i am going to start with the blue Marble you would have a 1/8 chance of drawing the blue marble from the box and after that you would have a 3/7 of drawing a white marble because you did not replace the blue marble and I hope this help.