Of course, this requires tank storage and a loading pipe. Liquid feed can be drained into the loader bucket and dumped into the mixer wagon, but most who have tried this say it's unsatisfactory. Pumping it through a pipe into the running mixer is far better. It would take 45 months to pay for this investment through the assumed grain savings only. Interest on purchased commodities is not included.
Interest is charged on the total capital investment.
Labor for buying, mixing, and feeding grains is based on averages of other commodity feeders. Make the best estimate for your facilities. Prepared by Mike Gamroth, Extension dairy specialist, Oregon State University, Corvallis, OR 97331. These may already be part of the outside feeding program or used elsewhere on the dairy. Defining the total investment in commodity feeding is difficult because of variation in size of equipment, price paid, and other uses.