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
Profit margin, also known as net margin, net profit margin, or net profit ratio, is the net profit as a percentage of net revenue â the percentage of selling price that turned into profit, i.e. the amount by which revenue from sales exceeds a businessâ costs. Put simply, it is a measure of a businessâ profitability.