This tool will allow you to input your costs and see how the net margin for wheat, barley, oats and oilseed rape crops could be impacted by different yields and prices. The costs can be entered at whatever level you wish e.g. a total variable cost or enter the inidividual variable costs.
Download the tool below.
If you are interested in going into your costings in more detail and compare with others try AHDB's online benchmarking tool Farmbench