The key answer of exercise 1

a)

• Main photo → coins
• Top photo → a bill
• Middle photo → a cash till; cash
• Bottom photo → a discount

b)

• A bargain is something which is cheaper than you expected. A discount is when money is taken off the usual price.
• A coin is made of metal and a bank note is made of paper.
• A cashpoint is a machine in or outside a bank or shop and you can take money out of it. A cash till is used in a shop or restaurant, and it's where the money you have paid is put.
• A credit card is a small plastic card which allows people to buy goods without using cash and pay for them later. Cash is coins and notes.
• A currency is the money of a country, e.g. pounds, dollars, and an exchange rate is the price at which we buy and sell money.
• A receipt is what we get after we buy something and a bill is a price of paper that tells us how much we have to pay.
• A wallet is for notes or bank cards and a purse is for coins.