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
The Meaning of the Net Profit Margin Ratio. When you look at the net profit margin ratio, you see that the numerator (net income) is affected by the company's actions to reduce expenses and the denominator (net sales) is affected by the company's actions to increase sales revenue. Net profit margin indicates how well the company converts its sales into profits.