I know the answers (they are bold) im just unsure how to show the work for these problems

Use the following information for Questions 8 & 9

The Sasita Corporation manufactures two types of vacuum cleaners, the ZENITH for commercial building use and the House-Helper for residences. Budgeted and actual operating data for the year 20X5 were as follows:

Static Budget ZENITH House-Helper Total

Number sold 5,000 20,000 25,000

Contribution margin $1,500,000 $3,000,000 $4,500,000

Actual Results ZENITH House-Helper Total

Number sold 4,000 28,000 32,000

Contribution margin $1,280,000 $3,920,000 $5,200,000

Prior to the beginning of the year, a consulting firm estimated the total volume for vacuum cleaners of the ZENITH and House-Helper category to be 250,000 units, but actual industry volume was 256,000 units.

Question 8

What is the total sales-volume variance in terms of the contribution margin?

1. $900,000 favorable
2. $1,260,000 favorable
3. $200,000 unfavorable
4. $360,000 unfavorable

Question 9

What is the total sales-quantity variance in terms of the contribution margin?

1. $200,000 unfavorable
2. $900,000 favorable
3. $360,000 unfavorable
4. $1,260,000 favorable