Enter the marginal cost function for the firm, given as follows: \frac{Q}{2}
The marginal cost function is the inverse of the supply function. To obtain the correct units, invert the supply function so that it is expressed in terms of Q.

Enter the price function for the firm, given as follows: 60-0.5Q
The price function is the inverse of the demand function. To obtain the correct units, invert the demand function so that it is expressed in terms of Q.

You can use both sliders, Tax on Supply and Tax on Demand to change the tax amount. The dashed line represents the supply or demand curve after tax. The green shaded area signifies consumer surplus, while the light blue area represents producer surplus. The orange shaded area indicates the government surplus or government profit. Please note that the tax incidence does not depend on the party upon which the tax is imposed.