Answer:
$8.10
Explanation:
First step is to determine the tax rate, which you can easily figure out with the first sentence, since you have $4.48 tax on $56 purchase. The tax rate is then:
TR = 4.48 / 56 = 0.08 or 8%
Now, the question can be rephrased as "What's the total difference, including taxes, between a purchase of $66.25 (A) and another of $58.75 (B)"
Let's find out the total cost for both purchases:
A = 66.25 * 1.08 = 71.55 (66.25 + 8% tax)
B = 58.75 * 1.08 = 63.45 (58.75 + 8% tax)
Difference is then 71.55 - 63.45 = 8.10
The $66.25 purchase of goods will cost $8.10 more than the $58.75 purchase of goods once the 8% tax is applied.