Store A charges $1,200 for repairs with a 6 percent sales tax. Store B charges $1,350 with a 7 percent sales tax. Explain how you would determine the amount of money saved by using Store A instead of Store B?

We know from the question that Store A charges $1200 for repairs and 6% as sales tax.

Then

Amount of sales tax charged by Store A = (6/100) * 1200

= 6 * 12

= 72 dollars

Then the total amount charged by Store A = (1200 + 72) dollars

= 1272 dollars

Now coming to Store B. It charges $1350 for repairs and 7% of sales tax.

Amount of sales tax charged by Store B = (7/100) * 1350

= 945/10

= 94.5 dollars

Then the total amount charged by Store B = (1350 + 94.5) dollars

= 1444.5 dollars

Amount of money saved by choosing Store A instead of Store B = (1444.5 - 1272) dollars

= 172.5 dollars

So $172.5 is saved by choosing Store A over Store B.