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. Definition. Profit margin represents the percentage of revenue that a company keeps as profit after accounting for fixed and variable costs. It is calculated by dividing net income by revenue. The profit margin is mainly used for internal comparisons, because acceptable profit margins vary between industries.