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 the world of business and finance, a margin is the difference between two values or sums of money. Marketing involves a company's attempt to inform potential buyers of its product or service, drawing attention to it in such a way that an audience will be willing to purchase it.hen companies buy a product to act as a distributor or retailer, it must sell the product at a higher price than that at which they purchased it. In such situations, the marketing margin of a product is the difference between what a company pays for the product and what it charges for the product.