Susan purchases a calculator for $120 and pays a sales tax of 10%. How much change will she receive from $140?

• A. $5
• B. $8
• C. $10
• D. $12

Answer: (B)

To determine how much change Susan will receive from $140 after purchasing a calculator for $120 and paying a sales tax of 10%, we first need to calculate the total cost including the sales tax.

First, we calculate the amount of sales tax on the calculator:

Sales Tax = 10% of $120

= 0.10 × 120

= $12

Next, we add the sales tax to the original price of the calculator to find the total cost:

Total Cost = Price of Calculator + Sales Tax

= $120 + $12

= $132

Now, we can find out how much change Susan will receive from $140:

Change = Amount Paid - Total Cost

= $140 - $132

= $8

So, Susan will receive $8 in change. This answer is correct because it accurately reflects the total cost after tax and the amount she paid, leading to the correct calculation of her change.