In serious business sectors rms supply amount of the item equivalents to the level at which the cost of the great equivalents negligible expense (supply bend and peripheral expense bend are unconcerned]. On the off chance that an extract charge [an expense on the merchandise being sold} is forced on makers of the specic great or administration, the stockpile bend movements to one side as a result of the expansion of peripheral expense. The duty size predicts the new degree of amount provided, which is diminished in contrast with the underlying level. In Figure 1 - an interest bend is added into this occasion of cutthroat market. The interest bend and moved supply bend make another balance. which is troubled by the tax.[4] The new balance {with more exorbitant cost and lower amount than beginning balance) addresses the value that shoppers will pay for a given amount of good stretched out by the piece of the assessment {\\displaystyle (p_{0]+kt),l(\\in [0,1].} [\\displaystyle {p_{0]I-kt],k\\in [0,1].}