# How to use Cost Sell Margin on your Casio Calculator

You’ve noticed the trusted 3 keys displayed on your favourite Casio office calculator: Cost, Sell, and Margin. Chances are while you realise what they do, you might not be certain how to easily calculate using them.

For this example, we’re going to use our popular model, the DF120FM. At the top of your calculator, you’ll notice the 3 keys: Cost | Sell | Margin

Example 1: What’s the cost of an item that sells for \$150 with a 30% margin added?

Cost: ?, Selling Price: \$150, Margin: 30%

1. Use the AC button to turn your calculator on
2. Now, set the selling price. Input 150 and press the ‘SELL’ button
3. You’ve now told the calculator that 150 is the selling price, and can now set the margin amount
4. Input 30 and press the ‘MAR’ button
5. You’ve now told the calculator that 150 is selling price with a 30% margin
6. From here, press ‘COST’, and the calculator will display the final amount on your screen, equalling \$105. You’ll notice a ‘Cost’ indicator will be displayed at the top of your screen, in the centre

Example 2: What’s the selling price of an item that costs \$120 after a 40% margin is added?

Cost: \$120, Selling Price: ?, Margin: 40%

1. Use the AC button to turn your calculator on
2. Now, set the cost price. Input 120 and press the ‘COST’ button
3. You’ve now told the calculator that 120 is the cost price, and can now set the margin amount
4. Input 40 and press the ‘MAR’ button
5. You’ve now told the calculator that 120 is cost price with a 40% margin
6. From here, press ‘SELL’, and the calculator will display the final amount on your screen, equalling \$200. You’ll notice a ‘Sell’ indicator will be displayed at the top of your screen, in the centre

Example 3: What’s the margin on an item that costs \$800 and sells for \$2,000?

Cost: \$800, Selling Price: \$2,000, Margin: ?

1. Use the AC button to turn your calculator on
2. Now, set the cost price. Input 800 and press the ‘COST’ button
3. You’ve now told the calculator that 800 is the cost price, and can now set the selling price
4. Input 2,000 and press the ‘SELL’ button
5. You’ve now told the calculator that 800 is cost price with a selling price of 2,000
6. From here, press ‘MAR’, and the calculator will display the final amount on your screen, equalling 60%. You’ll notice a ‘MAR %’ indicator will be displayed at the top of your screen, on the right

Models with this feature:

• WD220MS
• HR8RC
• DF120FM