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 formula is: Gross profit margin measures company's manufacturing and distribution efficiency during the production process. It is a measurement of how much from each dollar of a company's revenue is available to cover overhead, other expenses and profits.ross profit margin formula is: Gross profit margin measures company's manufacturing and distribution efficiency during the production process. It is a measurement of how much from each dollar of a company's revenue is available to cover overhead, other expenses and profits.