Calculating Sales Tax and Total Cost

The video tutorial explains how to calculate the total cost of an item including sales tax. It begins with identifying the key numbers in the problem, setting up an equation to find the sales tax, and then performing the calculation. The result is rounded to two decimal places to reflect typical monetary values. Finally, the sales tax is added to the original price to find the total cost Ms. Martinez will pay for her earphones.

What is the initial price of the earphones before tax?

• $48.40

• $48.25

• $48.30

• $48.35

What percentage of sales tax is applied to the earphones?

• 10.30%

• 10.20%

• 10.15%

• 10.25%

How do you convert a percentage to a decimal for calculation?

• Divide by 10

• Multiply by 100

• Divide by 100

• Multiply by 10

What is the decimal equivalent of 10.25%?

• 0.1025

• 1.025

• 0.01025

• 10.25

What is the result of multiplying 0.1025 by 48.35?

• 4.975

• 4.955875

• 4.935

• 4.965

Why is it necessary to round the result of the sales tax calculation?

• To make it easier to read

• To avoid errors in calculation

• To fit it into the chart

• Because money is usually represented with two decimal places

What is the rounded value of 4.955875?

• 4.98

• 4.97

• 4.96

• 4.95

What is the final sales tax amount after rounding?

• $4.96

• $4.94

• $4.95

• $4.97

What is the total cost of the earphones including the sales tax?

• $53.20

• $53.10

• $53.00

• $53.30

What is the final step to find the total cost Ms. Martinez will pay?

• Add the sales tax to the price

• Multiply the price by the sales tax

• Subtract the sales tax from the price

• Divide the price by the sales tax