Cost Sell Margin Example
To find the 'selling' price?
Enter '100' and press COST
Enter '20' and press MARGIN
Automatically displays '125' without pressing the SELL key!

To find the 'cost' price?
Enter '125' and press SELL
Enter '20' and press MARGIN
Automatically displays '100' without pressing the COST key!

To find the 'margin' percentage? 
Enter '100' and press COST
Enter '125' and press SELL
Automatically displays '20' without pressing MARGIN key.