Early in 2017, the owners of Cubs Boats were reviewing sales data from 2016 in preparation for the 2017 boating season. They have assembled the following information related to the company's performance in 2016.

Cubs makes three models: the Banks, the Sosa, and the Santo. The company's budgeted and actual data for 2016 is as follows:

	Banks	Sosa	Santo
Standard contribution margin	800	800	1,200
Standard quantity	24,000	20,000	6,000
Actual contribution margin	750	820	1,180
Actual quantity	24,000	22,000	5,600

Compute the total variation in contribution margin from standard that can be attributed to the variation in sales volume. Be sure to show your work and/or explain how you computed your answer.