Joshua W. answered 01/07/15
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ANSWER: The total cost to the customer is 281.27. Explanation follows.
The sales tax is calculated on the entire $404 of the new vacuum:
(6 3/4%)(404)=27.27
Then you subtract the 150 trade-in value from the $404 price of the new vacuum
404-150=254
Now, add 27.27 to 254 to get the total cost to the customer:
27.27+254=281.27