EXPENSE FACTOES IN" CITY DISTRIBUTION OF PERISHABLES 35 
General Relationships which result in 
Tendency Towards Constancy of Spread 
per Retail Sale for 14- Commodities 
TOTAL RETAIL VALUE 
TOTAL RETAIL VALUE 
RETAIL PRICE PER POUND 
RETAIL PRICE PER POUND 
A. Among the 14 commodities there 
is an inverse curvilinear relationship 
between percentage margins and total 
retail values. 
of 
B. The above association is the result 
a direct curvilinear relationship be- 
tween total distribution expense and total 
retail value, with the curve bending 
toward the total-retail-value axis. 
C. Analysis of the relationship be- 
tween total distribution expense and total 
retail value reveals a direct curvilinear 
association between spread per pound and 
retail price per pound, with the curve 
bending toward the retail-price axis. 
D. There is an inverse curvilinear re- 
lationship between size of the retail sale 
and retail price per pound. 
E. Spread per retail sale is the product 
of spread per pound and number of 
pounds per retail sale. Combination of 
the direct relationship in "C" and the 
inverse relationship in "D" results in a 
tendency toward constant spread per 
retail sale for all commodities. 
RETAIL PRICE PER POUND 
ALL COMMODITIES 
Fig. 13. — Inverse relationship between percent- 
age margins and total retail value of different 
commodities is explained by constancy ofspread 
per retail sale 
