Method: Lay a ruler across the chart for the grade of cattle you are feeding. Place the edge on the cost of feeders and on the cost of corn. The point where the ruler crosses the center line shows the selling price needed to pay feed costs, interest on cost of feeders and normal death risk.
Malone, Carl C.
"Figuring the Selling Prices Needed in Selling Cattle,"
Iowa Farm Science: Vol. 1
, Article 4.
Available at: https://lib.dr.iastate.edu/farmscience/vol1/iss6/4