Hi, 

What is the cost of a guitar that regularly sells for a $150 

is on sale for 18% off and the sales tax is 4.5%.

18% off ... paying .82%  

Total cost = .82(150) + .045(.82(150) = .82(150)( 1 + 1.045) 

Total cost =.82(150)( 1 + 1.045) = $128.54

Wish You the Best in your Studies. 

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