What formulas should i use to determine the price ?
Basic fundamentals like fertilizer costs, water costs and shipping costs are priced into grain production overhead.
Water is generally becoming more scarce as drought increases, a trend attributed to climate change. Reduced supply of water is correlated with higher base price of crop and meat production.
Chemical fertilizer is produced from natural gas. The value of gas is also rising which prices into the base cost of grain production.
Shipping and transportation costs are also rising and priced into the base cost of production.
Farmers will seek to find market alternatives which are more affordable. At a certain tipping point organic fertilizer will become more affordable in contrast to chemical fertilizer.
But in general rising costs of water, natural gas, fertilizer and shipping will be priced into general production and lead to price hikes. With the exception being subsidized farms which might produce at a gross loss to maintain affordable food prices for the general public.