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The problem provided contains information about a company's cost function and asks several questions regarding profit. Let’s break down and solve the questions step by step.

### Information Given:
- **Fixed Costs (FC)** = Rp 20,000
- **Variable Costs (VC)** = Rp 100Q (where Q is the quantity produced)
- **Selling Price per Unit** = Rp 200

### 1. **At what production level will the company start making a profit?**
To determine when the company will start making a profit, we need to find the break-even point where total revenue equals total cost.

- **Total Cost (TC)** = Fixed Costs (FC) + Variable Costs (VC)  
  \( TC = 20,000 + 100Q \)

- **Total Revenue (TR)** = Selling Price × Quantity  
  \( TR = 200Q \)

The company starts making a profit when \( TR > TC \). At the break-even point, \( TR = TC \), so:

\[
200Q = 20,000 + 100Q
\]

Solving for \( Q \):

\[
200Q - 100Q = 20,000
\]
\[
100Q = 20,000
\]
\[
Q = \frac{20,000}{100} = 200
\]

Thus, the company will start making a profit when they produce and sell more than **200 units**.

---

### 2. **What is the profit at a production level of 300 units?**

Profit is the difference between total revenue and total cost:

\[
\text{Profit} = TR - TC
\]

For \( Q = 300 \):

- \( TR = 200 \times 300 = 60,000 \)
- \( TC = 20,000 + 100 \times 300 = 20,000 + 30,000 = 50,000 \)

Thus, the profit is:

\[
\text{Profit} = 60,000 - 50,000 = 10,000
\]

So, the profit at 300 units is **Rp 10,000**.

---

### 3. **Draw the curve conditions for points (a) and (b):**

This part of the question asks for a graph showing the relationship between cost, revenue, and production quantity. The break-even point occurs at 200 units, and profit starts increasing after this point. The total cost curve will start at Rp 20,000 and increase linearly with a slope of 100, while the total revenue curve will increase with a slope of 200.

#### Key Points:
- At \( Q = 200 \), the total revenue and total cost curves intersect.
- At \( Q = 300 \), there is a profit of Rp 10,000.

I can describe this curve mathematically, but for an actual plot, I would need graphing tools or graphing software.

Would you like me to create a plot for these curves?

---

### Follow-up Questions:

1. How do we calculate the break-even point for different fixed and variable costs?
2. What happens if the selling price per unit is lower than the variable cost per unit?
3. How does an increase in fixed costs affect the break-even point?
4. If production reaches 500 units, what would the profit be?
5. How does profit change if the selling price is raised to Rp 250?

### Tip:
When analyzing cost functions, always differentiate between fixed and variable costs. Fixed costs do not change with production, while variable costs scale with the quantity produced.

Jika diketahui fungsi biaya suatu perusahaan dinyatakan oleh FC = 20,000 dan VC = 100Q. Sedangkan harga jual produk yang dihasilkannya ditetapkan Rp 200 per unit. Mulai pada tingkat produksi berapa unit perusahaan akan memperoleh keuntungan? Berapa keuntungan yang diperoleh pada tingkat produksi 300 unit? Gambarkan kondisi kurva dari point a dan b?

Learn how to analyze a company's cost function with fixed costs (FC) of Rp 20,000 and variable costs (VC) of 100Q, and how to calculate the break-even point and profit. Includes step-by-step solutions for calculating profit at a production level of 300 units. Suitable for high school students.

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