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 manufacturing margin, also called gross profit margin or the gross margin, represents the total amount of income your company keeps after paying the direct costs related to the manufacturing of products sold. It is critical for a company to have a generous operating margin to pay its fixed costs, such as the interest payments on debt.