A company reports the following information about its sales and its cost of sales. Each unit of its product sells for $500. Use these data to prepare a scatter diagram. Draw an estimated line of cost behavior and determine whether the cost appears to be variable, fixed, or mixed.

Period

Sales

Cost of Sales

Period

Sales

Cost of Sales

1

$15,000

$10,100

4

7,500

5,500

2

11,500

7,500

5

9,000

6,000

3

10,500

7,000

6

12,500

9,500