Using a break-even chart
You can use a break-even chart to plan, monitor, maintain control and set targets. A break-even chart is often included in a business plan.
In the case of Rholiau Rhian above, the break-even chart is useful to see if the number of sandwiches that need to be sold each month is realistic.
It is also possible to see what happens if the price is increased or decreased.
Pause for thought
Calculate how many sandwiches Rholiau Rhian would need to sell each month if the price were raised to £4.00 per sandwich.