Memphis costs

Question

In Memphis, the sales tax rate is 7.45%. A 1tb external hard drive costs $54.99, and a 5tb external hard drive costs $139.99. Rounded to the nearest cent, how much more is the tax on the 5tb hard drive that the 1tb hard drive?

Answer 1

1 tb = $54.99 * 7.45% = $4.023 -> $4.02

5 tb = $139.99 * 7.45% = $10.429 -> $10.43

 

$10.43 - $4.02 = $6.41

 

Answer 2

1tb drive:

($54.99)*(0.0745) = $4.10

 

5tb drive:

($139.99)*(0.0745) = $10.43

 

Difference

 $10.43 - $4.10 = $6.33