The sandbox is 40 cubic feet because 2 x 4 x 5 = <<2*4*5=40>>40

He needs 120 pounds of sand because 40 x 3 = <<40*3=120>>120

He will take 60 trips because 120 / 2 = <<120/2=60>>60

He will need to drink water 15 times because 60 / 4 = <<60/4=15>>15

He will drink 45 ounces of water because 15 x 3 = <<15*3=45>>45

He will need 3 bottles of water because 45 / 15 = <<45/15=3>>3

He will spend $6 on water because 3 x 2 = <<3*2=6>>6

He will have $4 in change because 10 - 6 = <<10-6=4>>4

# Answer

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<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Tony has a bucket that holds 2 pounds of sand. He has a sandbox out back that is two feet deep, four feet wide, and 5 feet long. A cubic foot of sand weighs 3 pounds. Because it's hot outside, he wants to make sure he stays hydrated, so every 4 trips he takes he drinks 3 ounces of bottled water. A 15 ounce bottle of water costs $2. He has $10 with him. How much change will he have after he buys all the water he needs?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
4
Tony has a bucket that holds 2 pounds of sand. He has a sandbox out back that is two feet deep, four feet wide, and 5 feet long. A cubic foot of sand weighs 3 pounds. Because it's hot outside, he wants to make sure he stays hydrated, so every 4 trips he takes he drinks 3 ounces of bottled water. A 15 ounce bottle of water costs $2. He has $10 with him. How much change will he have after he buys all the water he needs?
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