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
Margins in Business, Finance, and Investing. Definition, Meaning Explained, Example Calculations. In business and commerce generally, margin refers to the difference between the seller's cost for acquiring products and the selling price. Margins appear as percentages of net sales revenues. Margin has slightly different meanings in financial accounting and investing.