A TV that usually sells for $189.78 is on sale for 30% off. If sales tax on the TV is 6%, what is the price of the TV, including tax?

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Answer:

The remaining cost of the tv is 70%, so multiply 189.78 times .7 to get 132.85. Then multiply that by .06 to get the sales tax which is 7.9. Then add those two numbers to get 140.75 $