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 margin is the difference between net sales and cost of goods sold, or net sales minus cost of goods sold. Gross margin is also known as gross profit and represents the productivity of a businessâs operations. A businessâs profitability is defined by more than its operations.