Tutorial One – A visit to McDonald’s

Paul and his wife Emma set off from their home in Yorkshire to drive for a holiday in Scotland. It’s late in the morning, and the young couple are on the A1, heading up to Scotch Corner. The scenery is new and exciting, and their home seems a long way away. It’s noon, so they decide to eat a fast lunch at the next exit. A few miles later, they leave the Al and begin to wonder where they should eat. But the question is answered for them almost as soon as it has arisen, for at the bottom of the exit ramp is a familiar sign, a gold arch on a red background – ‘McDonald’s – Straight Ahead One Mile’. McDonald’s! Hamburgers! French fries! ‘Let’s eat at McDonald’s!’ Paul suggests. ‘We can’t see anywhere else to go, and at least we know what their food is like’. ‘Sure’ Emma agrees. ‘I could just eat a cheeseburger...or maybe even a Big Mac!’. About a mile further on is a large shopping centre, and at the far ends of its car park the golden arches of McDonald’s are plainly visible. Paul and Emma enter the restaurant, walk down the centre aisle between uniform rows of spotlessly clean tables, and examine the menu that is posted behind and above the service counter. Exactly the same menu as the one back home! They quickly decide what to have and approach the counter. ‘Can I take your order, please?’ inquires the crew member, smiling at them. ‘Two Big Mac meals with Diet Coke, to go please’. ‘Is that large?’ she replies. The order is placed using pre-programmed shortcuts on the till. ‘Is that everything, sir?’ she asks. Paul looks at his wife, who shakes her head. ‘Er, no. Thanks anyway’. The crew member totals up the sale and states the amount in a clear voice. Paul gives her a ten-pound note. ‘Ten pounds,’ she says, counting out the correct change and giving it to Paul before putting the note in her cash drawer. Change