They there! What you should do is say if you were an employee trying to help her is "Your coupon can only be used on full-sale prices." Which saying, her coupon is invalad and, telling her what is wrong, and telling her what she can do to get the coupon right. What you could say is "Over there is 'For example' some knifes, they are full-priced and those you can use with the coupon." I hope my explanation helped! Let me know if you needed a diffrent answer! Your fellow Brainly user, GalaxyGamingKitty.