For the tuna Barbara needed to pay 5 * 2 = $<<5*2=10>>10.

For the four bottles of water, she needed to pay 4 * 1.5 = $<<4*1.5=6>>6.

On different goods Barbara spend 56 - 10 - 6 = $<<56-10-6=40>>40.

# Answer

40
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Barbara went shopping in a supermarket. She bought 5 packs of tuna for $2 each and 4 bottles of water for $1.5 each. In total, she paid $56 for her shopping. How much did Barbara spend on different than the mentioned goods?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
40
Barbara went shopping in a supermarket. She bought 5 packs of tuna for $2 each and 4 bottles of water for $1.5 each. In total, she paid $56 for her shopping. How much did Barbara spend on different than the mentioned goods?
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