<|im_start|>system
You are a helpful assistant. You first think about the reasoning process in the mind and then provide the user with the answer. You should try to truely solve the question by yourself without cheating.  <|im_end|>
<|im_start|>user
 In a jewelry store display, there are 15 diamonds. Next to them are labels indicating their weights, written as $1, 2, \ldots, 15$ carats. The shopkeeper has a balance scale and four weights with masses $1, 2, 4,$ and $8$ carats. A customer is allowed only one type of weighing: place one of the diamonds on one side of the scale and the weights on the other side to verify that the weight indicated on the corresponding label is correct. However, for each weight taken, the customer must pay the shopkeeper 100 coins. If a weight is removed from the scale and not used in the next weighing, the shopkeeper keeps it. What is the minimum amount that needs to be paid to verify the weights of all the diamonds?

[8 points]

(A. V. Gribalko) Show your work in <think> </think> tags. And return the final answer in <answer> </answer> tags.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>
user
800
In a jewelry store display, there are 15 diamonds. Next to them are labels indicating their weights, written as $1, 2, \ldots, 15$ carats. The shopkeeper has a balance scale and four weights with masses $1, 2, 4,$ and $8$ carats. A customer is allowed only one type of weighing: place one of the diamonds on one side of the scale and the weights on the other side to verify that the weight indicated on the corresponding label is correct. However, for each weight taken, the customer must pay the shopkeeper 100 coins. If a weight is removed from the scale and not used in the next weighing, the shopkeeper keeps it. What is the minimum amount that needs to be paid to verify the weights of all the diamonds?

[8 points]

(A. V. Gribalko)
test