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
Gross Profit Margin. The gross profit margin (gross margin) measures the profit a company makes from its cost of goods sold (cost of sales). Cost of sales represents expense related to labor, raw materials and manufacturing overhead used in the production process.ross Profit Margin. The gross profit margin (gross margin) measures the profit a company makes from its cost of goods sold (cost of sales). Cost of sales represents expense related to labor, raw materials and manufacturing overhead used in the production process.