Answer:
c. $403.13
Explanation:
Cost of lawnmower = $328.61
Cost of lawn sprinkler = $13.27
Cost of hose reel = $27.96
total cost of purchase without tax = 

Taxes applied:
State tax = 5.5%
County tax = 1.5%
City tax = 2%
Total percent of taxes applies = 

Amount added as tax = 

⇒ 

⇒ 

⇒ 

Tax amount = $33.29
∴ Purchase price including tax = Cost price + Tax amount = 
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