Sometimes a radio program is added to the carrier in such a way that the program signal causes fluctuations in the carrier's frequency. This is called frequency modulation (FM). Another way of sending a radio signal is to make the peaks of the carrier wave bigger or smaller.
Calculating the percentage profit made. It is also possible to work out the percentage profit that is made on a deal. This is done using the profit and the price that something cost originally, before it was sold on (the Cost Price). Percentage Profit = (profit/cost price) x 100%. The next example shows how this is done. Example.
The gross profit margin calculation can be done manually by first taking the total revenue or total sales of the company and then subtracting the cost of goods sold (COGS) to arrive at the gross profit number and then taking that gross profit number and dividing it by the total revenue or total sales number.