Little material has been published on the subject of packing costs. On page 15 there is a reference to one source of information; and the Appendix to this article is a summary of the system of the Institute of American Meat Packers. Mr. Bliss\u27s article makes clear the difference between major products, by-products and joint products and the costing methods for each of these classes of products. His injection of the term opportunity costs, a term used by H. J. Davenport in his Economics of Enterprise, and in his Value and Distribution; and by John R. Turner in his Introduction to Economics and by other economists, is another interesting feature of this article. This term is little used by accountants, but is an appropriate one, particularly, in the packing industry. Most accountants call opportunity costs inter-departmental or inter-organization sales or transfers
