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One model of microwave regularly sells for $214. It is on sale for 35% off. The sales tax on it is 6%. what is the closets estimate to the final cost?

Can you please show work. 
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1 Answer

C = cost
 
Original price:  $214
Price discounted by 35%:  ($214)(1.00 - 0.35) = $139.10
6% sales tax on discounted price:  0.06($139.10) ≅ $8.35
 
C = discounted price + tax = $139.10 + $8.35 = $147.45
 
You can also work this in one step:
 
C = ($214)(1.00 - 0.35)(1.06) ≅ $147.45