Instead of thinking about one field changing in response to the change of the other, it is more correct to say that. whenever the magnetic field is changing, so is the electric field, and vice versa.The way these fields change is governed by Maxwell's equations.This way, we do not arrive at the confusion OP has.nstead of thinking about one field changing in response to the change of the other, it is more correct to say that. whenever the magnetic field is changing, so is the electric field, and vice versa.
Gross profit = net sales â cost of goods sold. Gross profit percentage = [(net sales â cost of goods sold)/net sales] Ã 100%.
Definition. Gross profit margin (gross margin) is the ratio of gross profit (gross sales less cost of sales) to sales revenue.It is the percentage by which gross profits exceed production costs. Gross margins reveal how much a company earns taking into consideration the costs that it incurs for producing its products or services.efinition. Gross profit margin (gross margin) is the ratio of gross profit (gross sales less cost of sales) to sales revenue.