The aim of the present paper is to study the problem that business administration 
confront and consists of whether the reduction in the unitary income from the 
provision of discounts (sales) is equal to at least the total increase of income derived 
from the exercise of the required demand.

It consists of two parts. Part 1 is dedicated to the presentation of the problem in 
connection with relevant references. In Part 2 the best frequency of providing 
reductions is determined via a simple sales model which gives the determination of 
the necessary size of the sales' increase.

The authors via methodology and presentation of examples propose that every 
enterprise has to create more than one situation of competition action or reaction in 
order to form a credit and sales approach, where the aims of the income will be in line 
with the long-term marketing strategy.