She needs 60 ounces of food because 30 / .5 = <<30/.5=60>>60

She needs 4 jars of food because 60 / 15 = <<60/15=4>>4

It will cost $8 to feed them because 4 x 2 = <<4*2=8>>8

# Answer

8
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Sylvie is feeding her turtles. Each turtle needs 1 ounce of food per 1/2 pound of body weight. She has 30 pounds of turtles. Each jar of food contains 15 ounces and costs $2.  How much does it cost to feed the turtles?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
8
Sylvie is feeding her turtles. Each turtle needs 1 ounce of food per 1/2 pound of body weight. She has 30 pounds of turtles. Each jar of food contains 15 ounces and costs $2.  How much does it cost to feed the turtles?
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