although it is impossible to make a pile of money worth exactly $3, it is still possible to byy somthing toat costs $3. you can give two $7 bills to the cashier and receive one $11 bill as change. find all amounts that cannot be used as prices because thay are impossible to make out of $7 and $11 bills if you can get change when making a purchase. Is there a greatest impossible price beyond which all prices are possible? if not ,why not?if so, can you explain why all prices beyond that price are possible?

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