The following bar graph shows the number of units sold (in thousands) for four different products over three quarters. Calculate the total number of units sold for Product C across all three quarters. What is the percentage increase in the number of units sold from Quarter 1 to Quarter 3 for Product C?                                           
     Bar Graph (Textual Representation)

Product	Quarter 1	Quarter 2	Quarter 3
Product A	30,000	45,000	55,000
Product B	20,000	25,000	35,000
Product C	15,000	30,000	40,000
Product D	25,000	35,000	50,000                                                                                        Options:

A) 30,000 units
B) 40,000 units
C) 45,000 units
D) 50,000 units

To solve the problem, we will first calculate the total number of units sold for Product C across all three quarters. Then, we will determine the percentage increase from Quarter 1 to Quarter 3.

### 1. Total number of units sold for Product C across all three quarters:
- Quarter 1: 15,000 units
- Quarter 2: 30,000 units
- Quarter 3: 40,000 units

\[
\text{Total units} = 15,000 + 30,000 + 40,000 = 85,000
\]

### 2. Percentage increase in the number of units sold from Quarter 1 to Quarter 3:
We use the percentage increase formula:

\[
\text{Percentage increase} = \frac{\text{New Value} - \text{Old Value}}{\text{Old Value}} \times 100
\]

Here, the new value is 40,000 (Quarter 3) and the old value is 15,000 (Quarter 1).

\[
\text{Percentage increase} = \frac{40,000 - 15,000}{15,000} \times 100 = \frac{25,000}{15,000} \times 100 \approx 166.67\%
\]

### Conclusion:
- **Total units sold for Product C**: 85,000 units
- **Percentage increase from Quarter 1 to Quarter 3 for Product C**: 166.67%

### Answer for total units: **None of the provided options (A, B, C, or D) matches the calculated total units, which is 85,000.**

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#### Related Questions:
1. What is the total number of units sold for Product A across all three quarters?
2. Calculate the percentage increase in the number of units sold from Quarter 1 to Quarter 3 for Product B.
3. What is the percentage increase in the number of units sold from Quarter 1 to Quarter 2 for Product D?
4. How many more units were sold for Product D in Quarter 3 compared to Quarter 2?
5. What is the overall percentage increase for Product C across all three quarters?

**Tip:** When calculating percentage increases, ensure you compare the difference relative to the original value.

The following bar graph shows the number of units sold (in thousands) for four different products over three quarters. Calculate the total number of units sold for Product C across all three quarters. What is the percentage increase in the number of units sold from Quarter 1 to Quarter 3 for Product C?

Product    Quarter 1   Quarter 2   Quarter 3
Product A  30,000      45,000      55,000
Product B  20,000      25,000      35,000
Product C  15,000      30,000      40,000
Product D  25,000      35,000      50,000

Options:
A) 30,000 units
B) 40,000 units
C) 45,000 units
D) 50,000 units

Solve the problem of calculating the total number of units sold for Product C across all three quarters and the percentage increase from Quarter 1 to Quarter 3. Understand the steps for performing these calculations, suitable for students in Grades 6-8.

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