Suppose the Market Demand for Milk Is Q^d = 150

Suppose the market demand for milk is Q^d = 150 - 5P.Additionally,suppose that a dairy's variable costs are VC = 2Q² (where Q is the number of gallons of milk produced each day) ,its marginal cost is MC = 4Q and there is an avoidable fixed cost of $50 per day.In the long run there is free entry into the market.Suppose the demand for milk doubles.If in the short run the number of firms is fixed and their fixed costs are sunk,what is the short run equilibrium price?

A) $20 per unit
B) $24 per unit
C) $10 per unit
D) $40 per unit