Profit or Loss on a Computer Purchase

We want to check whether the man made a profit (gain) or a loss when selling his computer, and by how much.

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1. Understanding the given data

• Cost price of computer: ₹33,000
• Cost of installing RAM: ₹4,000
• Selling price of the computer (after RAM): ₹39,980

The total cost price (CP) is the sum of all money spent:

$$\text{Total CP} = 33{,}000 + 4{,}000 = 37{,}000$$

The selling price (SP) is:

$$\text{SP} = 39{,}980$$

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2. Profit or loss amount

Compare SP and CP:

• If SP > CP → Profit
• If SP < CP → Loss

Here:

$$\text{SP} - \text{CP} = 39{,}980 - 37{,}000 = 2{,}980$$

Since SP > CP, the man made a profit of ₹2,980.

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3. Profit percentage

Profit percentage is:

$$\text{Profit\%} = \frac{\text{Profit}}{\text{CP}} \times 100$$

So,

$$\text{Profit\%} = \frac{2{,}980}{37{,}000} \times 100 \approx 8.05\%.$$

So he gained about 8.05% on his total investment.

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4. What this visualization shows

This interactive visualization treats the problem as a simple profit–loss model:

• The cost bar stacks: base computer cost + RAM cost.
• The selling price bar is shown beside it.
• The difference between the bars is shaded as profit (if selling price is higher) or loss (if selling price is lower).
• You can adjust the sliders to see how changing the base price, extra cost (RAM), and selling price changes the profit/loss and the percentage.

The vertical axis is money (₹), scaled automatically. Neon colors show:

• Cyan: Base cost of computer
• Pink: Extra cost (RAM)
• Yellow: Selling price
• Bright green outline region: Profit
• Red outline region: Loss