The beginning of the amazing events at Krakatoa in 1883 date to May 20 when there were initial rumblings and venting from the volcano, which had been dormant for about 200 years.
A refinery margin is the revenue associated with refining petroleum, expressed as a value per volume (e.g. $/L), net of the cost of the crude oil input. The simplest refining
The crush margin is defined in a variety of ways but what is important to understand is how the. costs compare to the defined crush margin. In this analysis the crush margin (CM) is defined as. the value of the hog less the cost of the weaned pig, corn, and soybean meal. Specifically,