This is the money or income received from selling. It can also be referred to as sales revenue or turnover.
revenue
selling price x quantity sold
cost of sales
refers to the variable costs incurred as a direct result of making a product or providing a service, eg raw material costs.
overheads
The fixed costs that come from running an office, shop or factory, which are not affected by the number of specific products or services that are sold.
net profit
is the difference between the amount of money received from selling goods and services and all of the costs incurred in order to make them.
net profit
= operating profit - tax & interest
gross profit margin
the percentage of sales revenue that is left once the cost of sales has been paid