select the correct answer. you want to buy an item that costs $100. which of these is the most cost…

select the correct answer. you want to buy an item that costs $100. which of these is the most cost - effective choice for buying the item? a. using a paid membership card to buy it at a 10 percent discount b. buying it online at a 10 percent discount with a $5 shipping charge c. buying it at a 10 percent discount without sales tax

select the correct answer. you want to buy an item that costs $100. which of these is the most cost - effective choice for buying the item? a. using a paid membership card to buy it at a 10 percent discount b. buying it online at a 10 percent discount with a $5 shipping charge c. buying it at a 10 percent discount without sales tax

Answer

Explanation:

Step1: Calculate cost for option A

The item costs $100. With a 10 - percent discount, the price is $100\times(1 - 0.1)=100\times0.9 = 90$.

Step2: Calculate cost for option B

The item has a 10 - percent discount, so the price of the item is $100\times(1 - 0.1)=90$. Then add the $5 shipping charge, so the total cost is $90 + 5=95$.

Step3: Calculate cost for option C

The item has a 10 - percent discount, so the price of the item is $100\times(1 - 0.1)=90$. Without sales - tax, the total cost is 90.

Answer:

C. buying it at a 10 percent discount without sales tax