Layla checked the prices of 7 items available for purchase in the cafeteria. The prices were:
$3.00 $6.00 $7.00 $3.00 $7.00 $6.00 $4.00
What was the range of the prices of the items?
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To find the range of the prices, we subtract the lowest price from the highest price.
The highest price is $7.00 and the lowest price is $3.00.
So the range of the prices of the items is $7.00 - $3.00 = $<<7-3=4>>4.00. Answer: \boxed{4}.