From all the guests Samanta got $5/guest * 12 guests = $<<5*12=60>>60.

Including money Samanta put herself, she had $60 + $10 = $<<60+10=70>>70.

The cost of the gift was $70 - $15 = $<<70-15=55>>55.

# Answer

55
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Samanta is planning a party for her friend Marta. She decided to raise some money among the guests she invited, to buy Marta a gift. Every participant gave Samanta $5 for this purpose and she herself put in $10. The gift cost was lower than expected, so there was $15 leftover. What was the price of the gift, if there were 12 guests invited?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
55
Samanta is planning a party for her friend Marta. She decided to raise some money among the guests she invited, to buy Marta a gift. Every participant gave Samanta $5 for this purpose and she herself put in $10. The gift cost was lower than expected, so there was $15 leftover. What was the price of the gift, if there were 12 guests invited?
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