Ruby Company manufactures and sells a single product. The company's sales and expenses for last year follow. Click the icon to view the information) Read the requirements The total contribution margin is $ 30,000 b. What is the total variable expense? The total vanable expense is $120,000 ary es Modules c. How many units were sold? 5.000 units were sold d. What is the per-unit variable expense? The per-unit vanable expense is