In the paper we have analyzed the specific market configuration in whi
ch the producer is a monopoly and the trade cartelizes through the lev
el of trade margin. We have focused on three the most probable variant
s of producer and trade behaviour formulating the pricing strategy as
follows: 1) trade sets such margin tariffs as to maximize the volume o
f margin, 2) trade sets such margin tariffs so that the volume of trad
e margin would be equal to the profit volume + fixed costs of a produc
er, 3) producer sets (recommends) such margin tariffs so that the volu
me of trade margin and profit volume + fixed costs of a producer would
be maximum considering that the volume would be divided between trade
and producer proportionally. In all three model cases we have conside
red that the rate of VAT is constant and the margin tariffs are variab
le. Considering the mentioned market configuration and the variants of
producer and trade behaviour we had derived at first the methodologic
al procedure of solution which was applied at the simulated market. On
the basis of theoretical analysis we have reached the following concl
usions: a) In all the three model cases we have found that the amount
of margin tariffs is a function of demand elasticity and this dependen
ce is proportional indirectly. These interrelations were formulated ex
plicitly. b) The least productive behaviour of all the market subjects
is that one in which trade maximizes the volume of margin. c) The mos
t productive behaviour is that one when the monopoly (producer) determ
ines (recommends) the amount of margin tariffs on the basis of derived
principles, i. e. the amount of trade margin is a function of demand
elasticity.