EXPLANATION
Let's see the facts:
Machine price = $220.00
Sales tax=7%
At Store A-----> Discount=15%
At Store B----->Coupon for $35
Part I:
Sale price at Store A (including discount)= Machine Price*[100%-Discount] (In decimal form)
Sale price at Store A (including discount)= 220.00 * 0.85 = $187
Part II:
Sale price at Store A (including tax) = Sale price at Store A (including discount) + Sale price at Store A (including discount)* Tax in decimal form
Sale price at Store A (including tax) = 187 + 187*0.07 = $200.09
Part III:
Sale price at Store B (including coupon)=Machine Price-coupon discount
Sale price at Store B (including coupon)=220-35 = $185
Part IV
Sale price at Store B (including tax) = Sale price at Store B (including coupon) + Sale price at Store A (including coupon)* Tax in decimal form
Sale price at Store B (including tax) = 185 + 185*0.07 = $197.95
Part V:
Assuming that Maxine wants to spend the least amount of money as possible, he should buy the fax machine at Store B.
Answers:
Part I: $187
Part II: $200.09
Part III: $185
Part IV: $197.95
Part V: Store B