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The image you provided contains a section from a microeconomics textbook related to elasticity and revenue calculations. Here's a breakdown of the important elements shown:

1. **Price Elasticity of Demand Formula**: 
   The formula for elasticity of demand (Ep) is given as:
   \[
   E_p = \frac{\text{percentage change in quantity demanded}}{\text{percentage change in price}}
   \]
   
2. **Values provided**: 
   - \( E_p = 0.5 \)
   - \( P_{50} = 50 \) (Price at P50.00)
   - \( P_{55} = 55 \) (Price at P55.00)
   - Quantity at \( P_{50} = 1000 \)
   
3. **Change in quantity demanded**: 
   Using the formula for elasticity, we see that:
   \[
   \frac{Q_{55} - 1000}{1000} = \frac{-0.5}{\frac{55 - 50}{50}} = \frac{-0.5}{0.1} = -5
   \]
   Solving for \( Q_{55} \):
   \[
   Q_{55} - 1000 = -50 \quad \Rightarrow \quad Q_{55} = 950
   \]

4. **Total Revenue at P55**: 
   After finding the new quantity demanded \( Q_{55} = 950 \), the total revenue is calculated by multiplying the price at P55 with the new quantity:
   \[
   \text{Total Revenue} = P_{55} \times Q_{55} = 55 \times 950 = 52,250
   \]

This section demonstrates how elasticity impacts total revenue when prices change, and how a slight increase in price with inelastic demand results in a decrease in quantity demanded.

Would you like more detailed explanations on elasticity, or have any further questions?

### Relative Questions:
1. What happens to total revenue when demand is elastic versus inelastic?
2. How does price elasticity of demand affect pricing decisions?
3. Can you explain the relationship between elasticity and total revenue in other scenarios?
4. What factors influence the price elasticity of demand?
5. How would the elasticity calculation differ for larger price changes?

### Tip:
Always remember that when demand is inelastic (Ep < 1), increasing the price will usually lead to an increase in total revenue.

Calculate the total revenue at the price of Php55 when the price elasticity of demand is known, using the given data.

Learn how to calculate the total revenue for a price increase from Php50 to Php55, given an elasticity of demand of 0.5. This tutorial covers key microeconomic concepts and demonstrates how elasticity impacts revenue.

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