Question

Kelly buys 3 video games that cost $18.96 each. She also buys 2 pairs of earbuds that cost $11.50 each. She has a coupon for $2 off the price of each video game. Kelly us a calculator, as shown, to find that the total cost of the items is $77.85. The cashier tells her that the total cost is $73.85. Who is correct? Justify your argument.

Answer 1

Answer:

The cashier is correct.

Kelly is wrong because he calculated the coupon as 1 and deducted only $2 from the total price of goods instead of calculating the total amount of coupon and deducting from the total price of goods.

Note that the coupon is $2 off the price of each video game

Explanation:

Let run through the sum of the goods Kelly bought;

3 video games that cost $18.95 each;

$3\times 18.95 =\text{ \ 56.85}$

2 pairs of earbuds that cost $11.50 each;

$2\times11.50=\text{ \ 23}$

Total is;

$\text{ \ 56.85}+\text{ \ 23}=\text{ \ 79.85}$

Given that She has a coupon for $2 off the price of each video game.

For the 3 video games, the coupon is;

$3\times\text{ \ 2}=\text{ \ 6}$

The total cost will then be the total price of goods minus the coupon;

$\begin{gathered} C=\text{ \ 79.85}-\text{ \ 6} \\ C=\text{ \ 73.85} \end{gathered}$

Therefore, the cashier is correct.

Kelly is wrong because he calculated the coupon as 1 and deducted only $2 from the total price of goods instead of calculating the total amount of coupon and deducting from the total price of goods.

Note that the coupon is $2 off the price of each video game