The total labour cost of producing a certain item is £43 per 100 items produced. The raw materials cost £25 per 1000 items. There is a set-up cost of £50 for each production run. Obtain the formula for the cost of a production run of x items.

The manufacturer decides to have a production run of 2000 items. What is its cost? If the items are sold at £1.20 each, write down a formula for the manufacturer’s profit if x items are sold. What is the breakeven number of items sold?