The supply and demand conditions facing a firm that makes widgets and generates a negative externality by dumping a highly toxic sludge in a nearby river is given in the table below.

Price	Quantity Demanded	Quantity Supplied without Paying Social Costs	Quantity Supplied after Paying Social Costs
100	0	120	75
80	10	100	50
55	30	90	30
40	55	85	25
30	80	80	20
20	100	65	15

The equilibrium price and quantity when only private costs are taken into account are