A good example of this can be found in the retail trade. Suppose a com- pany buys a dress wholesale for $100 and marks it up 100 percent, thereby establishing the retail price at $200. Suppose in a clearance sale the company decides to sell it at cost. This would represent a 50 percent markdown (i.e., from $200 down to $100). 3 The algebraic expression of this demand equation is Q = 36 - 2P and the inverse demand equation is P = 18 - 0.5Q.
how the algebraic expressions were found.