Additionally, due to a considerable improvement in the shale oil extraction technology, the shale oil plants (3 plants in the South-East, numbered SE1 through SE3; and 4 plants in the East, numbered E1 through E4) are able to reduce their respective marginal costs by 60% and increase capacity by 100% (double the capacity, essentially). For example, for Plant SE2, marginal cost was $32 with capacity of 50 (50 thousand barrels per day); now, these become an MC of $12.80 and capacity of 100 (100 thousand barrels per day)