How do you design a program that asks for the sale figures, computes the total sales for the year, and calculates and displays final sale figures for the four quarters in 2010 and displays the average quarterly sale for the year?

This can be done by writing a flow-chart, or pseudocode.

The steps are exactly as you posted. Detailed design or coding depends on the coding language you are expecting to use. Some will display charts with one line of code, others might need a user-written procedure.

If you post a proposed design, we will be glad to help you improve or correct what you have.

To design a program that fulfills the requirements you mentioned, you can follow these steps:

1. Define the Variables: Start by defining variables to store the sales figures for each quarter, the total sales for the year, and the average quarterly sale.

2. Input Sales Figures: Prompt the user to input the sales figures for each quarter. You can use a loop or individual input statements to get the sales figures for each quarter and store them in the respective variables.

3. Calculate Total Sales: Once you have all the sales figures, sum them up to calculate the total sales for the year. You can achieve this by adding the sales figures of all four quarters together.

4. Calculate Final Sale Figures: Calculate the final sale figures for each quarter by dividing the individual sales figures by the total sales for the year. This will give you the percentage contribution of each quarter to the total sales. Multiply the percentages by 100 to get the final sale figures.

5. Calculate Average Quarterly Sale: To find the average quarterly sale, divide the total sales for the year by 4 (as there are four quarters in a year). This will give you the average sales for each quarter.

6. Display Output: Finally, display the final sale figures for the four quarters in 2010 and the average quarterly sale for the year.

Here's an example of how the program could be implemented in Python:

```python
# Step 1: Define Variables
quarter1 = 0
quarter2 = 0
quarter3 = 0
quarter4 = 0
total_sales = 0
average_quarterly_sale = 0

# Step 2: Input Sales Figures
quarter1 = float(input("Enter sales figures for Quarter 1: "))
quarter2 = float(input("Enter sales figures for Quarter 2: "))
quarter3 = float(input("Enter sales figures for Quarter 3: "))
quarter4 = float(input("Enter sales figures for Quarter 4: "))

# Step 3: Calculate Total Sales
total_sales = quarter1 + quarter2 + quarter3 + quarter4

# Step 4: Calculate Final Sale Figures
final_quarter1 = (quarter1 / total_sales) * 100
final_quarter2 = (quarter2 / total_sales) * 100
final_quarter3 = (quarter3 / total_sales) * 100
final_quarter4 = (quarter4 / total_sales) * 100

# Step 5: Calculate Average Quarterly Sale
average_quarterly_sale = total_sales / 4

# Step 6: Display Output
print("Final Sales Figures for the Four Quarters in 2010:")
print("Quarter 1:", final_quarter1, "%")
print("Quarter 2:", final_quarter2, "%")
print("Quarter 3:", final_quarter3, "%")
print("Quarter 4:", final_quarter4, "%")
print("Average Quarterly Sale:", average_quarterly_sale)
```

This program prompts the user to enter the sales figures for each quarter, calculates the total sales, final sale figures for each quarter, and the average quarterly sale, and then displays the results. You can modify this example to suit your programming language of choice.