ACCOUNTING FOR VARIATION IN GROSS PROFIT.
This article calls attention to the following points: (1) A fundamental understanding of accounting for variation in gross profit is most readily imparted by the instructor, and assimilated by the student, if the factors involved are interpreted in terms of straight lines, areas, and their respective ratios; the resulting diagram would serve as a useful graphic accompaniment to any report containing a schedule of analysis of variation in gross profit; (2) Prior to the drawing up of the formal schedule(s) in customary "longhand" form, the use of "mathematical shorthand," as illustrated in the accompanying schedules as well as in the text of this article, appreciably increases the efficiency and effectiveness with which both oral and written discussion of the subject can be conducted; in the conventional analysis, at least two concepts, which still remain to be expressed satisfactorily in words, may be conveyed with ease and explicitness in terms of lines, areas, and symbols; (3) The conventional analysis and the various types of schedules resulting there from are subject to adverse criticism in respects other than the one very appropriately cited by Fullerton to the effect that part of the change in gross profit which is not due to the change in the physical volume of sales, is not due to the change in the gross profit rate, but to the change in the unit gross profit; (4) Although the scope of this article is restricted to the subject of gross profit variation, it should be observed that much of the following discussion has a direct bearing on the theory underlying standard cost accounting.