7)18/1.65=10.9 so the meal cost £10.90
8)96/1.54=62.3376623377 so the jacket cost £62.38
9)874/350=2.497142857 so it cost £2.49
10)15/1.12=13.3928571 meaning the pair of sunglasses in Portugal costs £13.39 so it is cheaper to buy the glasses in boots