Question 1204982
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Total charge is   7*32 + 750*0.21 = 381.50 dollars.    <U>ANSWER</U>
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Solved.


The formula which I used is SELF-EXPLANATORY.


If you do not understand something in the solution, look at it and listen it attentively.


It will tell you then the whole story.



Why ? - Because mathematical formulas can speak for themselves.