The Regal Cycle Company manufactures three types of bicycles$-$a dirt bike, a mountain bike, and a racing bike. Data on sales and expenses for the past quarter follow:

$\backslash$table$[[,,,$Mountain,Racin$],[\backslash$table$[[$Sales$],[$Variable manufacturing and selling expenses$],[$Contribution margin$]],$$$923,$$$266,000,$$$403,000,$$$254,000$