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
In business and finance there are many types of margin. It simply means the distance between one financial point and another financial point; usually the higher the margin, the better. The most common type of margin revolves around profit and is known as the 'margin of safety' or simply 'profit margin'. In a business you have direct and indirect costs.