Answer: Our required answer is $0.13.
Step-by-step explanation:
Since we have given that
25 items purchased @ $21.25
So its unit price is given by
[tex]\frac{21.25}{25}=0.85[/tex]
50 items purchased @ 36.00
So, its unit price is given by
[tex]\frac{36}{50}=0.72[/tex]
80 items purchased @ 60.00
So, its unit price is given by
[tex]\frac{60}{80}=0.75[/tex]
So, Highest unit price for the whistles will be $0.85
Lowest unit price for the whistles will be $ 0.72
Difference between the highest unit price and lowest unit price for whistles will be
[tex]0.85-0.72=\$0.13[/tex]
Hence, our required answer is $0.13.