another would be, sam went into the duty free shop with £300. she brought 2 bottles of perfume for £45 each bearing in mind if you buy 2 you get £5 off. she then brought some jewellery which was £170 but payed £150 as she had discount. she also brought a handbag being £150. she also really wanted some alcohol which was £22, how much more money would she need to pay for the full amount.